A head-mounted display includes a shell, a display generation unit, a processing unit, at least one pressure sensor, and a linkage mechanism. The display generation unit includes at least an optical engine and a mirror connected to the optical engine. The processing unit is electrically connected to the optical engine and the pressure sensor, and the pressure sensor detects an external force applied to the shell and outputs a pressure signal to the processing unit. The linkage mechanism is electrically connected to the processing unit and connected to the display generation unit. The processing unit actuates the linkage mechanism to cause the mirror of the display generation unit to move away from the user's face.