The Middleweight class in the boxing competition was the third-highest weight class. Middleweights were limited to those boxers weighing a maximum of 75 kilograms (165.3 lbs). 22 boxers qualified for this category. Like all Olympic boxing events, the competition was a straight single-elimination tournament. Both semifinal losers were awarded bronze medals, so no boxers competed again after their first loss. Bouts consisted of six rounds each. Five judges scored each bout.^[1]

Gold	Chris Finnegan  Great Britain
Silver	Aleksei Kiselyov  Soviet Union
Bronze	Agustín Zaragoza  Mexico
	Alfred Jones  United States

Finnegan was unable to produce a urine sample immediately after the bout for the compulsory drugs test. He drank copious amounts of beer and water, to no effect. Finnegan then attended a local restaurant for a victory meal, where, at 1:40 am, he was able to produce a sample, which proved negative.^[2]

Since boxer George Aidoo from Ghana could not compete, a new draw was made after the preliminary bouts. Simeon Georgiev from Bulgaria drew a bye.

•  Raúl Marrero (CUB) def.  Saulo Hernández (PUR), DSQ-2
•  Chris Finnegan (GBR) def.  Titus Simba (TAN), 5:0
•  Simeon Georgiev (BUL) def.  Mario Casati (ITA), 4:1
•  Alfred Jones (USA) def.  Marcelo Quiñones (PER), 5:0
•  Mate Parlov (YUG) def.  Lahcen Ahidous (MAR), 5:0
•  Aleksei Kiselyov (URS) def.  Antoine Abang (CMR), 5:0
•  Jan van Ispelen (NED) def.  Misael Vilugron (CHI), TKO-2