A barrier device includes: liquid crystal barriers extending in a first direction and disposed away from a display plane of a display section that displays an image. The liquid crystal barriers include a liquid crystal layer and sub-electrodes and allow light to transmit therethrough and block the light. The liquid crystal barriers structure at least one group of the liquid crystal barriers. The sub-electrodes, belonging to a first liquid crystal barrier of a pair of the liquid crystal barriers, adjoin, in a second direction, the sub-electrodes belonging to a second liquid crystal barrier in the pair of the liquid crystal barriers. The pair of the liquid crystal barriers are adjacent to each other in the at least one group of the liquid crystal barriers, and the second direction is different from both of a vertical direction and a horizontal direction within the display plane of the display section.