Abstract: A rotatable monitor has a display section being rotatable laterally for 0-180 degrees and covering on an operative section by its front side or rear side thereof. The rotatable monitor comprises a display section with a pivotal section on bottom thereof; an operative section with a pivotal stage on front side thereof and pivotally connected to the pivotal section. The pivotal section has a pivotal mechanism comprising a movable rack arranged on the display section and a fixed rack arranged on the pivotal section and being pivotal with respect to the movable rack. A rotational shaft is provided between the pivotal stage and the fixed rack. The display section can be locked to or unlocked from the pivotal section by retainers.