The men's 100 metres at the 1983 IAAF World Championships was held at the Olympic Stadium in Helsinki, Finland on 7 and 8 August 2022.

67 athletes from 49 nations entered to the competition Existing records at the start of the event.

The first 3 athletes in each heat ( Q ) and the next 5 fastest ( q ) qualified for the quarter-finals.

The quarter-finals took place on 7 August, with the 32 athletes involved being split into 4 heats.

The semi-finals took place on 8 August, with the 16 athletes involved being split into 2 heats.