The purpose of the present study was to determine whether aspirin affects on exercise performance and body temperature during exercise in high temperature, 20 college-age men performed a 70％ VO₂max exercise on a treadmill on two different occasions, after aspirin(1000㎎ of aspirin) and placebo administration, Measurement of rectal temperature, mean body temperature, VO₂max, VEmax, fRmax Rmax and HRmax was carried out. There were no significant differences in rectal and mean body temperature between the two exercises, The analysis of HRmax, VEmax and fRmax showed statistically significant differences between before and aspirin administration, Duration of exercise did not change after aspirin administration, suggesting that aspirin administration(1000㎎) does not affect exercise performance in high temperature.