Stoycho Mladenov (Стойчо Младенов) (born 12 April 1957 in Chernokonevo,Dimitrovgrad) is a Bulgarian football player and football manager. He started from small teams like Dimitrovgrad and gradually moved to bigger teams like Cska Sofia. From there he went all around the world, however best moments of winning were in Portugal and also with his National Team. His best years were spent as a striker for CSKA Sofia. He also served the club as a manager and head coach.

Mladenov's nickname is "Liverpool's Executor" in honor of his winning goals against the European champion Liverpool FC in UEFA European Champions Cup 1/4 finals in season 81/82.

Mladenov's finest game as a player was on 17 March 1982, when he scored both of CSKA's goals as they beat Liverpool 2-0 in Sofia to knock the English giants out of the European Cup quarter-finals.

Mladenov played also in Portugal in several clubs like V.Setúbal,GD Estoril-Praia, Olhanense, but was in C.F. Os Belenenses where he achieved one third place in Portuguese football league and won a Portuguese Cup beatting Benfica in the final, after winning in the prior stages teams like FC Porto and Sporting CP.

He was also responsible for the victory that Belenenses had over Barcelona in the UEFA Cup of 1988 , when he stole the ball from Barcelona's defender Shuster and made a perfect assistance for Mapuata's goal. Nowadays he trains the most successful Bulgarian team CSKA Sofia. Finacial problems at his favourite club CSKA Sofia pushed him away after a series of compromises he had done during his time there. Now he is a coach at Al-Ahli. His son Alexandar Mladenov is a professional footballer.