: Cigarette smoke contains three main toxic components, namely carbon monoxide, nicotine, and tar that can cause disturbances in spermatogenesis. The objective of this study was to investigate and observe the effect of cigarette smoke exposure on the quality of spermatozoa of mice. The study was a completely randomized experimental design. The research subject as many as 25 male mice who were randomly divided into 5 groups: group P0 not given exposure, the P1 is given exposure to smoke from 1 bar of cigarette, the P2 is given exposure to smoke from 2 bars of cigarette, the P3 is given exposure to smoke from 3 bars of cigarette and finally the P4 is given exposure to smoke from 4 bars of cigarette. The treatment is given for 30 days. At the end of experiment, results showed a significant difference in the concentration and motility of spermatozoa between the groups exposed to cigarette smoke (p<0,05) compared with the control group. The morphology of spermatozoa group P2,P3,P4, was found substantially different with the control group (p<0,05) but group P1 did not have significant difference in results with the control group. The exposure to cigarette smoke negatively affects sperm quality caused by the free radicals generated by the smoke