PURPOSE: A line hauler for a fishing operation is provided to facilitate the mount of a drum and to transfer power. CONSTITUTION: A line hauler for a fishing operation comprises a housing(10), a fixed shaft(30), a rotary shaft(50), a motor, a first drum(D1), and a second drum(D2). The motor is turned on or off by a power switch installed in the housing and provides rotary power to the rotary shaft. The rotary shaft is provided with the rotary power of the motor. The fixed shaft is installed with an interval from the rotary shaft. The first drum and second drum are inserted between the fixed shaft and rotary shaft. The motor and rotary shaft are mounted in the housing.본 발명은 갈치 등을 조업하기 위해 바다에 투승된 낚싯줄을 감아 끌어올리는 양승기에 관한 것으로서, 특히 낚싯줄을 바다에 투승할 낚싯줄이 감긴 드럼과 고기가 잡힌 낚싯줄을 감아 올리는 드럼을 공회전용 고정축과 연동용 회전축에 탈착 가능하게 장착한 조업용 양승기에 관한 것이다.