A control device for gas appliances comprises: a manual-control element (12, 22); a circuit arrangement that includes control elements, electrical-interconnection elements, detection elements configured for detecting actuation of the manual-control element (12, 22) and supplying corresponding signals to the control elements; and a supporting structure that can be associated in a stationary way with respect to a gas tap (10), wherein the supporting structure includes a first part of stationary structure (21) that defines a housing for at least part of the circuit arrangement, the first part of structure being in particular designed for being housed within a body (3) of the gas appliance. The control elements are designed for counting the time, the circuit arrangement includes display elements (D′), and the supporting structure includes a second part of stationary structure (43, 44) associated to or projecting from the first part of structure (21) and configured for supporting the display elements (D) in a fixed or not angularly rotatable position, where in particular, in an installed condition of the device (20), the second part of structure (43, 44) projects on the outside of the body (2, 3) of the gas appliance (1).