Abstract: A coin counter includes a chassis supporting a rotary disk and a chute extending from the disk. An operation device is arranged below one side of the chute and includes first and second plates coupled to an adjusting valve. First and second posts extend from ends of the first and second plates, respectively and are fixed to the chassis. A thickness adjusting mechanism is fixed to and supported by the second post, while a coin forwarding mechanism is fixed to and supported by the first post. Such a construction allows the thickness adjusting mechanism and the coin forwarding mechanism to be individually removable from the chassis as individual sub-assemblies, which facilitates ready mounting/dismounting and thus easy maintenance and repairing.