A lens cover apparatus for camera includes a housing, a cover, and a slider. The cover is rotatably mounted to the housing to open/close a lens window for selectively exposing/shielding a lens of the camera. The slider is manually movable with respect to the housing to induce a horizontal movement of a first linkage, which is converted into a rotary motion of the cover by a second linkage that has a lever forming a slot movably receiving and guiding a peg extending from the cover.