The heater-fumigator of the present invention is a cordless type heater-fumigator for a chemical whose plug (12) is directly fixed to the back of the body (1). The body (1) is equipped with a heater (5) for heating a chemical and a fitting port (7) for fitting and coupling a chemical bottle (8). The chemical bottle (8) is removably fitted and connected to the fitting port (7) and the upper part of a suck-up wick (11) of the chemical is positioned inside the heater (5). This structure can reduce the size and weight of the fumigator, and makes it possible to fit stably the cordless type heater-fumigator though it deals with chemicals and to replace the bottle (8) easily.