A viewfinder includes a main body detachably attached to a camera body, a display unit on which an image captured at the camera body is displayed, and an eyepiece unit detachably attached to the display unit. The eyepiece unit magnifies the image. The display unit includes a support connected to the main body in a rotatable manner, a display panel having a display surface on which the image is displayed, and a connecting mechanism that connects the display panel to the support in a rotatable manner. The support and the display panel can be set to a first folded state in which a rear surface of the display panel that is opposite to the display surface is placed on the support, a second folded state in which the display surface is placed on the support, and an unfolded state in which the display panel is raised from the support.