The present invention provides an improved structure of laser sight, which comprises a sight body, a block, a displacement adjusting device, and a switch. The block can be disposed flexibly to locations on one side of the sight body for fitting different type of firearms. The displacement adjusting device can control the location of a laser module inside the laser sight for changing the location of light emission of the laser module and modifying the location of the laser module. The switch is used for controlling the laser module and improving the convenience in control. By using the structure described above, the laser sight will have better practicability and sighting performance.