An operation/indication apparatus for an elevator, comprising: a position indicator, a call button, a face board, on which the position indicator and the call button are exposed; a cable connected to the position indicator and a call button; a supporting member for supporting a cable extending in a hoistway; a base to which the supporting member is fixed; at least one projecting portion including an expanded-diameter portion having a diameter larger than a diameter of a base portion, the at least one projecting portion being provided to one of the supporting member and the base; and a fastening hole, through which the at least one projecting portion is to be inserted, the fastening hole being provided to another of the supporting member and the base so as to correspond to the at least one projecting portion, wherein: the fastening hole comprises a passage portion and a retaining portion; the passage portion has a size which allows the expanded-diameter portion of the at least one projecting portion to pass therethrough; and the retaining portion has a size which prevents the expanded-diameter portion of the at least one projecting portion from passing therethrough and allows the base portion to pass therethrough, the supporting member comprises a covering portion; and the cable is provided inside the covering portion, characterized in that the apparatus further comprises a communication window for the cable, which is formed through the base, wherein the passage portion of the fastening hole is formed of the communication window. a position indicator, a call button, a face board, on which the position indicator and the call button are exposed; a cable connected to the position indicator and a call button; a supporting member for supporting a cable extending in a hoistway; a base to which the supporting member is fixed; at least one projecting portion including an expanded-diameter portion having a diameter larger than a diameter of a base portion, the at least one projecting portion being provided to one of the supporting member and the base; and a fastening hole, through which the at least one projecting portion is to be inserted, the fastening hole being provided to another of the supporting member and the base so as to correspond to the at least one projecting portion, wherein: the fastening hole comprises a passage portion and a retaining portion; the passage portion has a size which allows the expanded-diameter portion of the at least one projecting portion to pass therethrough; and the retaining portion has a size which prevents the expanded-diameter portion of the at least one projecting portion from passing therethrough and allows the base portion to pass therethrough, the supporting member comprises a covering portion; and the cable is provided inside the covering portion, characterized in that the apparatus further comprises a communication window for the cable, which is formed through the base, wherein the passage portion of the fastening hole is formed of the communication window. the fastening hole comprises a passage portion and a retaining portion; the passage portion has a size which allows the expanded-diameter portion of the at least one projecting portion to pass therethrough; and the retaining portion has a size which prevents the expanded-diameter portion of the at least one projecting portion from passing therethrough and allows the base portion to pass therethrough, the supporting member comprises a covering portion; and the cable is provided inside the covering portion, characterized in that the apparatus further comprises a communication window for the cable, which is formed through the base, wherein the passage portion of the fastening hole is formed of the communication window.