A power generation switch apparatus comprising: a plurality of switch keys (11 to 16); a power generation apparatus that is driven to perform power generation by an operation force applied to any one of the plurality of the switch keys (11 to 16), the power generation apparatus having a housing; a plurality of switches (SW1 to SW5) being supplied with an electric power generated by the power generation apparatus and performing a switching movement by an operation of the switch keys (11 to 16), wherein the number of switches in the plurality of switches is less than the number of switch keys in the plurality of switch keys; and a switch signal transmission circuit (41, 42) being driven by the electric power from the power generation apparatus and outputting a plurality of switch signals that are different from each other in correspondence with the switching movement of the plurality of switches (SW1 to SW5), the switch signal transmission circuit (41, 42) including a switch control circuit connected to the plurality of switches (SW1 to SW5), wherein the switch signal transmission circuit (41, 42) is configured to transmit the switch signal to an electronic device according to the switch key (11 to 16) being operated, wherein the switch control circuit is configured to detect the operation of the plurality of switch keys (11 to 16) based on a corresponding relationship between an on/off state of one or more switches of the plurality of switches (SW1 to SW5) and operations of the switch keys (11 to 16), wherein the corresponding relationship is stored beforehand in the switch control circuit, and wherein the switch control circuit is configured to determine which switch key (11 to 16) is operated according to the corresponding relationship, the power generation switch apparatus being characterized in that the plurality of switches includes a built-in switch provided in the housing of the power generation apparatus, and switches (SW1 to SW4) provided to face the corresponding switch keys (11, 13, 14, 16), in that the power generation apparatus comprises an operation lever projecting from the housing and including a first operation part and a second operation part, the first and second operation parts (32A, 32B) being configured to be operated by pressure exerted thereon when the corresponding switch keys (11 to 16) are operated by the operation force applied to any one of the plurality of the switch keys (11 to 16), the power generation apparatus being configured to perform power generation, regardless of which of the switch keys (11 to 16) is operated, and in that the built-in switch is configured to engage the second operation part and to be switched from an OFF state to an ON state when the second operation part is operated. a plurality of switch keys (11 to 16); a power generation apparatus that is driven to perform power generation by an operation force applied to any one of the plurality of the switch keys (11 to 16), the power generation apparatus having a housing; a plurality of switches (SW1 to SW5) being supplied with an electric power generated by the power generation apparatus and performing a switching movement by an operation of the switch keys (11 to 16), wherein the number of switches in the plurality of switches is less than the number of switch keys in the plurality of switch keys; and a switch signal transmission circuit (41, 42) being driven by the electric power from the power generation apparatus and outputting a plurality of switch signals that are different from each other in correspondence with the switching movement of the plurality of switches (SW1 to SW5), the switch signal transmission circuit (41, 42) including a switch control circuit connected to the plurality of switches (SW1 to SW5), wherein the switch signal transmission circuit (41, 42) is configured to transmit the switch signal to an electronic device according to the switch key (11 to 16) being operated, wherein the switch control circuit is configured to detect the operation of the plurality of switch keys (11 to 16) based on a corresponding relationship between an on/off state of one or more switches of the plurality of switches (SW1 to SW5) and operations of the switch keys (11 to 16), wherein the corresponding relationship is stored beforehand in the switch control circuit, and wherein the switch control circuit is configured to determine which switch key (11 to 16) is operated according to the corresponding relationship, the power generation switch apparatus being characterized in that the plurality of switches includes a built-in switch provided in the housing of the power generation apparatus, and switches (SW1 to SW4) provided to face the corresponding switch keys (11, 13, 14, 16), in that the power generation apparatus comprises an operation lever projecting from the housing and including a first operation part and a second operation part, the first and second operation parts (32A, 32B) being configured to be operated by pressure exerted thereon when the corresponding switch keys (11 to 16) are operated by the operation force applied to any one of the plurality of the switch keys (11 to 16), the power generation apparatus being configured to perform power generation, regardless of which of the switch keys (11 to 16) is operated, and in that the built-in switch is configured to engage the second operation part and to be switched from an OFF state to an ON state when the second operation part is operated.