A sensor bracket includes a bracket on which a camera (a sensor) that detects a state around a vehicle is mounted, a flat spring that abuts against the camera in a direction that maintains a mounted state of the camera when the camera is mounted on the bracket, and a stopper restricting, in between a space where a tool is positioned and an inner surface of a piece of glass, a displacement range of the tool from the space to the inner surface of the piece of glass when the flat spring is dismounted from a projection for the spring of the bracket with the tool.