Abstract: A holder device is provided for supporting a utility implement such as a fishing rod and a lantern, comprising a base member adapted to be mounted on a side of a boat and the like, having an elongated socket formed therein, a removable coupling member for removably carrying the fishing rod or lantern including an arm element having a cam portion formed adjacent an outer end thereof which is slideably engaged in said elongated socket, and a resilient biasing means carried by the base member providing a biasing force against a surface of the arm element cooperating with the cam portion so as to hold the arm element in the elongated socket. Thus, the coupling member is effectively prevented from being removed from the base member unless the coupling member and its associated implement is tilted angularly backwards and simultaneously pulled outwardly from the base member to overcome the resilient biasing means and release the cam portion from the socket.