A container holder includes a holder body, a cover, and a swing arm. The cover has a front end, a rear end, a first engager disposed adjacent to the rear end. The swing arm has a sliding groove extending in a direction crossing the up/down directions of the holder body, holds the first engager of the cover slidably and swingably with the sliding groove, and is held swingably to the holder body at one of the opposite ends. When the swing arm swings the cover from a close position to an open position, the swing arm lets the cover pass firstly a semi-open position, at which the sliding groove guides the cover so as to decline the rear end of the cover, and then lets the cover swing to the open position along with the swinging swing arm.