An image adjusting assembly for a monitoring camera has a connecting frame, a rotating bracket and a fastener. The connecting frame is mounted around the camera bracket and is attached slidably to the positioning arms and has an upper connecting frame and a lower connecting frame. The upper connecting frame has two open ends and a curved channel. The lower connecting frame is connected to the upper connecting frame and has two open ends, a curved channel and a positioning board. The rotating bracket is connected to the connecting frame and the camera bracket and has multiple connecting boards, a rotating board and a through hole. The rotating board is mounted slidably in the curved channels of the connecting frame. The fastener extends through the positioning board and presses against the rotating board to hold the rotating bracket in place.