The men's 100 metres event at the 2019 Summer Universiade was held on 8 and 9 July at the Stadio San Paolo in Naples.
Results.
Preliminaries.
Qualification: First 2 in each heat (Q) and next 5 fastest (q) qualified for the heats.
Wind: ;br ;Heat 1: -1.0 m/s, Heat 2: -0.4 m/s, Heat 3: -0.7 m/s, Heat 4: +1.5 m/s, Heat 5: +1.4 m/s
Heats.
Qualification: First 3 in each heat (Q) and next 3 fastest (q) qualified for the semifinals.
Wind: ;br ;Heat 1: +0.7 m/s, Heat 2: +0.7 m/s, Heat 3: +0.3 m/s, Heat 4: -0.4 m/s, Heat 5: -0.4 m/s, Heat 6: -0.2 m/s, Heat 7: 0.0 m/s, Heat 8: 0.0 m/s
Semifinals.
Qualification: First 2 in each heat (Q) and next 2 fastest (q) qualified for the final.
Wind: ;br ;Heat 1: -0.4 m/s, Heat 2: +0.4 m/s, Heat 3: -0.2 m/s
Final.
Wind: -0.1 m/s
References.
 ;templatestyles src="Reflist/styles.css" / ;