A brake mechanism of a fishing reel is provided. The fishing reel has a shaft and a gear. The brake mechanism includes a washer set, a tubular member, a brake adjusting device, a first stair portion and a spring member. The washer set includes a first driving washer sleeved at non-circular section of the shaft, and a first brake washer located between the first driving washer and the gear. The tubular member is movably disposed at non-circular section of the shaft and abutted against the washer set. The brake adjusting device is sleeved to the shaft, abutted against the tubular member, and includes a control member screwingly engaged to thread section of the shaft. The spring member is sleeved to the shaft and abutted against the first driving washer and first stair portion, respectively. Accordingly, the fishing reel not only brakes reliably, but also releases a brake status properly.
