Abstract: A coin whirling device for use in a coin-operated arcade game machine, the arcade game machine being of the type having a housing provided with a coin intake slit, for feeding discoid money coins into the enclosure defined within the housing and about a first plane, and a coin processor, located within the housing enclosure and operatively connected to the coin intake slit. The coin whirling device consists of a vertical cylinder, for capturing a coin fed into the housing. An axial slit in the cylinder opens into an upper end recess, being made up of two downwardly inclined oblique surfaces orthogonal to one another on opposite sides of the slit. These top leading surfaces will bias an incoming coin, oriented transversely thereof, to spin upon strike from the first plane to a second plane at right angle to the above-noted first plane. The coin whirling device provides compactness to the arcade game machine housing with respect to its dimensions along the first-mentioned plane, namely, its width.