Abstract: A backstop device prevents reverse rotation of a rotor in fishing reels The backstop device including an inner race and a backstop body, which are cooperatively assembled into a single body. The inner race has a plurality of needle rollers individually held in a roller seat opening. The backstop body is fitted over the inner race so as to prevent reverse rotation of the rotor and acts as an outer race of a one-way roller bearing. The roller bearing is free from any expensive or complicated outer race. The backstop device is also free from any gap formed between the bearing receiver of the backstop body and the roller bearing and reduces the production cost of a fishing reel.