The present invention provides a nebulizer system that allows an easy connection of a bottle, a heater device, and a nebulizer adapter, while eliminating a drain tube that is exposed to the outside to get in the way, and a heater device preferably for use in the nebulizer system. The nebulizer system (1) includes a bottle (2) that has a bottle mouth (25) on top thereof and stores liquid therein, a heater device (3) that is connectable to the bottle mouth (25), and a nebulizer adapter (4) that is connectable to the heater device (3). The bottle (2) includes a dip tube (22) that is dipped into the liquid stored inside therein. An upper end portion of the dip tube (22) is disposed inside a circumferential wall of the bottle mouth (25) with a clearance (226) communicating between an interior and an exterior of the bottle (2) via the bottle mouth (25). The nebulizer adapter (4) includes a nozzle member (42) that has an orifice (421) for injecting gas, and an aerosol-forming member (43) disposed in a corresponding position with the orifice (421), sucks up the liquid in the bottle (2) via the dip tube (22) and heater device (3) by a stream of gas injected from the orifice (421), and generates fine aerosol from the sucked liquid. The heater device (3) includes a water conduit (32) in which a first end portion thereof is connected to an upper end portion of the dip tube (22) and a second end portion thereof is connected to the aerosol-forming member (43), a heating unit (33) for heating the water conduit (32), and a drain pipe (35) in which a first end thereof is positioned to face the clearance (226), the drain pipe (35) flowing back the liquid that is not aerosolized in the nebulizer adapter (4) into the bottle (2) via a second end portion thereof.
