A cam apparatus of a suspended cam type includes a cam driver 2 having a sliding surface 9; a cam slide 3 which is moved with its sliding surface 28 in contact with the sliding surface 9 of the cam driver 2; a cam-slide supporting means 4 for supporting the cam slide 3 movably in an A direction; and a returning mechanism 5 for returning the cam slide 3 to its rear initial position in the A direction of that cam slide 3.