According to an illustrative embodiment, a head-mounted display is provided. The head-mounted display includes a detector for detecting an angle of tilt of the head-mounted display and an output unit for outputting an indication of the angle of tilt.根據說明性實施方式,提供一種頭戴式顯示器。頭戴式顯示器包括:用於檢測頭戴式顯示器的傾斜角度之檢測器;以及用於輸出傾斜角度的指示之輸出單元。1‧‧‧頭戴式顯示器5‧‧‧安裝部4‧‧‧主體41‧‧‧殼體51,52‧‧‧帶53‧‧‧調整器531,532‧‧‧調整構件541‧‧‧左附接構件55‧‧‧前額墊61‧‧‧加速度感測器71‧‧‧顯示單元711,712,713‧‧‧發光二極體411‧‧‧第一側表面(左側表面)413‧‧‧前表面414‧‧‧眼側表面415‧‧‧上表面416‧‧‧下表面