The present invention relates to a coin counting apparatus including: a frame in which an accommodation part is formed and a coin transfer channel connected to an outlet provided at a partition forming the accommodation part; a rotating transfer plate rotatably mounted in the accommodation part and including coin-accommodation grooves on a top surface thereof to transfer a coin; a coin-discharging roller unit configured to push the coin toward the outlet using rotational power of the coin to pass the coin through a counter sensing unit at a predetermined speed; and a coin detection unit including a light irradiation unit configured to emit a plurality of beams toward the coin transfer channel and an optical detection unit configured to detect beams reflected by coins to count the coins.