Segunda División B (Second Division B) is the third level of the Spanish football league system currently divided into 4 groups of 20 teams each. It is administered by the RFEF. It is below the top two levels of the league, the Primera División (also known as La Liga) and the Segunda División, and above the Tercera División. The Segunda División B includes the reserve teams of several La Liga and Segunda División teams.
The term Segunda División B was first used in 1929. It was used to designate a third level of teams after the Primera División and a Segunda División A. This division featured 10 teams and at the end of the season Cultural y Deportiva Leonesa were crowned champions. However the 1929–30 season saw the first of many reorganisations of the Spanish football league system and the original Segunda División B was replaced by the Tercera División. At the start of the 1977–78 season the Segunda División B was revived, replacing the Tercera División as the third level. Initially the division consisted of only two groups. The 1986–87 season was played as a single group of 22 teams. It was changed the next year, with 80 teams in four groups from the 1987–88 season.
Eligibility of players
Each team of Segunda División B can have 22 players in their roster, with these two limitations:
A maximum of 16 players over 23 years old.
A minimum of 10 players under professional contract.
The member clubs of the Segunda División B for the 2019–20 season are listed below.