Unión Deportiva Salamanca "B", also known as Club Deportivo Salmantino, was a Spanish football team based in Salamanca, in the autonomous community of Castile and León.

Founded on 22 October 1952, it was the reserve team of UD Salamanca, and last played in Tercera División – Group 8, holding home games at Pistas del Helmántico, which seats 5,500 spectators.

This first club project only lasted four seasons and UD Salamanca had to set it aside for a while in 1947, probably because of economical reasons.

With the dissolution of UD Salamanca on 18 June 2013 due to accumulated debts, Salamanca B also dissolved with the main side, immediately after it was forcibly relegated to the Primera División Regional of Castila & León.

It played in Tercera División its two first seasons, inheriting the place of Salamanca B, before being relegated to the last tier as it is considered a completely different club.