A sanitary washing device comprising: a plurality of jetting ports (834, 836, 838) for jetting washing water; a nozzle portion provided with a plurality of flow passages (835, 837, 839) communicating with the jetting ports (834, 836, 838); a nozzle drive part configured to advance and retract the nozzle portion between an accommodated position and a plurality of washing positions; a flow regulating valve for selectively supplying washing water to the plurality of flow passages (835, 837, 839); a water pump configured to supply washing water to the nozzle portion; a heat exchanger arranged upstream of the water pump and heating washing water; an operating part; and a control part, wherein the plurality of flow passages (835, 837, 839) include at least: a buttock washing water flow passage communicating with a buttock washing water jetting port; a bidet washing water flow passage communicating with a bidet washing water jetting port; and a nozzle cleaning flow passage communicating with a nozzle cleaning water jetting port, the control part is configured, when a washing operation which is one of buttock washing and bidet washing is performed by the operating part, to drive the water pump and the heat exchanger and, at the same time, to switch the flow passages (835, 837, 839) such that one of the buttock washing water flow passage and the bidet washing water flow passage is selected by the flow regulating valve, and to supply hot water heated by the heat exchanger to the selected flow passage (835, 837) for a predetermined time, wherein the nozzle portion is at an accommodated position; the control part is configured, after the predetermined time elapses, to switch the selection of the flow passage by the flow regulating valve to the nozzle cleaning flow passage, and to drive the nozzle drive part so as to advance the nozzle portion to one of a plurality of washing positions corresponding to the washing operation selected by the operating part from the accommodated position while the water pump and the heat exchanger are continuously driven, and the control part is configured, at the point of time that the nozzle portion reaches the one of the plurality of washing positions, to switch the flow passage to one of the buttock washing water flow passage and the bidet washing water flow passage corresponding to the washing operation selected by the operating part using the flow regulating valve. a plurality of jetting ports (834, 836, 838) for jetting washing water; a nozzle portion provided with a plurality of flow passages (835, 837, 839) communicating with the jetting ports (834, 836, 838); a nozzle drive part configured to advance and retract the nozzle portion between an accommodated position and a plurality of washing positions; a flow regulating valve for selectively supplying washing water to the plurality of flow passages (835, 837, 839); a water pump configured to supply washing water to the nozzle portion; a heat exchanger arranged upstream of the water pump and heating washing water; an operating part; and a control part, wherein the plurality of flow passages (835, 837, 839) include at least: a buttock washing water flow passage communicating with a buttock washing water jetting port; a bidet washing water flow passage communicating with a bidet washing water jetting port; and a nozzle cleaning flow passage communicating with a nozzle cleaning water jetting port, the control part is configured, when a washing operation which is one of buttock washing and bidet washing is performed by the operating part, to drive the water pump and the heat exchanger and, at the same time, to switch the flow passages (835, 837, 839) such that one of the buttock washing water flow passage and the bidet washing water flow passage is selected by the flow regulating valve, and to supply hot water heated by the heat exchanger to the selected flow passage (835, 837) for a predetermined time, wherein the nozzle portion is at an accommodated position; the control part is configured, after the predetermined time elapses, to switch the selection of the flow passage by the flow regulating valve to the nozzle cleaning flow passage, and to drive the nozzle drive part so as to advance the nozzle portion to one of a plurality of washing positions corresponding to the washing operation selected by the operating part from the accommodated position while the water pump and the heat exchanger are continuously driven, and the control part is configured, at the point of time that the nozzle portion reaches the one of the plurality of washing positions, to switch the flow passage to one of the buttock washing water flow passage and the bidet washing water flow passage corresponding to the washing operation selected by the operating part using the flow regulating valve.