The season 2003–04 of

Segunda División B Segunda División B (English: second division B) was the third tier of the Spanish football league system containing 102 teams divided into five groups, until it was replaced by the new structure in 2021. It was administered by the Royal Spanish ...

of Spanish football started August 2003 and ended May 2004.

Summary before the 2003–04 season

Playoffs de Ascenso: * Universidad de Las Palmas * Zamora *

Lanzarote Lanzarote (, , ) is a Spanish island, the easternmost of the Canary Islands, off the north coast of Africa and from the Iberian Peninsula. Covering , Lanzarote is the fourth-largest of the islands in the archipelago. With 163,230 inhabi ...

Pontevedra Pontevedra (, ) is a city in the autonomous community of Galicia (Spain), Galicia, in northwestern Spain. It is the capital of both the ''Pontevedra (comarca), Comarca'' and Province of Pontevedra, and the capital of the Rías Baixas. It is als ...

Real Unión Real Unión Club, S.A.D. is a Spanish football club based in Irun, in the autonomous community of the Basque Country, in the province of Gipuzkoa, near the border with France. Founded on 15 May 1915 it currently plays in Primera División RF ...

Barakaldo Barakaldo (; ) is a Municipalities of Spain, municipality located in the Biscay province in the Basque Country (autonomous community), Basque Country in Spain. Located on the Left Bank (Biscay), Left Bank of the Estuary of Bilbao, the city is pa ...

* Logroñés * Athletic Bilbao B * Castellón * Barcelona B *

Burgos Burgos () is a city in Spain located in the autonomous community of Castile and León. It is the capital and most populous municipality of the province of Burgos. Burgos is situated in the north of the Iberian Peninsula, on the confluence of th ...

* Gramenet *

Algeciras Algeciras () is a city and a municipalities in Spain, municipality of Spain belonging to the province of Cádiz, Andalusia. Located in the southern end of the Iberian Peninsula, near the Strait of Gibraltar, it is the largest city on the Bay of G ...

(P) * Málaga B (P) * Ciudad de Murcia (P) *

Cádiz Cádiz ( , , ) is a city in Spain and the capital of the Province of Cádiz in the Autonomous communities of Spain, autonomous community of Andalusia. It is located in the southwest of the Iberian Peninsula off the Atlantic Ocean separated fr ...

(P) ---- Relegated from

Segunda División The Campeonato Nacional de Liga de Segunda División, commonly known as Segunda División or La Liga 2, and officially known as LaLiga HyperMotion for sponsorship reasons, is the men's second professional association football division of the Spa ...

: * Compostela *

Racing Ferrol Racing Club de Ferrol, commonly known as Racing de Ferrol, is a Spanish football team based in Ferrol, Province of A Coruña, in the autonomous community of Galicia. Founded in 1919, the club currently plays in , holding home games at '' E ...

Oviedo Oviedo () or Uviéu (Asturian language, Asturian: ) is the capital city of the Principality of Asturias in northern Spain and the administrative and commercial centre of the region. It is also the name of the municipality that contains th ...

(relegated to Tercera División) *

Badajoz Badajoz is the capital of the Province of Badajoz in the autonomous communities of Spain, autonomous community of Extremadura, Spain. It is situated close to the Portugal, Portuguese Portugal–Spain border, border, on the left bank of the river ...

---- Promoted from

Tercera División Tercera División () was the fourth tier of the Spanish football league system. Until 1977, it was the third tier of the Spanish football league system. Founded in 1929, it was below the ''Primera División'' (also known as La Liga), the ''Segund ...

: *

Girona Girona (; ) is the capital city of the Province of Girona in the autonomous community of Catalonia, Spain, at the confluence of the Ter, Onyar, Galligants, and Güell rivers. The city had an official population of 106,476 in 2024, but the p ...

(from

Group 5 Group 5 may refer to: * Group 5 element, chemical element classification * Group 5 (motorsport), FIA classification for cars in auto racing See also * G5 (disambiguation) {{Disambig ...

) * Villajoyosa (from

Group 6 Group 6 may refer to: * Group 6 element, chemical element classification * Group 6 (motorsport), FIA classification for sports car racing * Group 6 Rugby League, rugby league competition in New South Wales, Australia {{disambig ...

) * San Sebastián de los Reyes (from

Group 7 Group 7 may refer to: * G7, an international group of finance minister *Group 7 element, chemical element classification *Halogens The halogens () are a group (periodic table), group in the periodic table consisting of six chemically related c ...

) *

Fuenlabrada Fuenlabrada () is a city and municipality of Spain located in the Community of Madrid. , it has a population of 193,586, making it the region's fourth most populated municipality. Placename The etymology of ''Fuenlabrada'' comes from the contra ...

(from

) * Rayo Majadahonda (from

) *

Palencia Palencia () is a city of Spain located in the autonomous community of Castile and León. It is the capital and most populated municipality of the province of Palencia. Located in the northwest of the Iberian Peninsula, in the northern half of ...

(from

Group 8 Group 8 may refer to: * Group 8 (Sweden), a feminist movement in Sweden * Group 8 element, a series of elements in the Periodic Table * Group 8 Rugby League, a rugby league competition * G8, or Group of 8, an inter-governmental political forum f ...

) *

Marbella Marbella ( , , ) is a city and municipality in southern Spain, belonging to the province of Málaga in the autonomous community of Andalusia. It is part of the Costa del Sol and is the headquarters of the Association of Municipalities of the re ...

(from

Group 9 Group 9 may refer to: * Group 9 element * Group 9 Rugby League *"Group 9", Australian arts collective, whose members included John Dowie {{disambig