A laser operation device has an elongated catheter, a light steering unit disposed at a front of a tip of the catheter, and a light irradiating unit configured to irradiate a laser to the front of the tip of the catheter, wherein the light steering unit is rotatable based on a rotary shaft and includes a plurality of prisms disposed in a circumferential direction of the rotary shaft, wherein the plurality of prisms are formed to have different deflection angles with respect to the same light, wherein the laser irradiated from the light irradiating unit is steered by refracting while passing through the prism, and wherein when the light steering unit rotates, the prism located at the front of the light irradiating unit is exchanged to adjust a steering angle of the laser.
