The invention relates to a simple humidifier. The simple humidifier comprises a charging bottom seat and a
steam generation device, wherein a mobile power source is arranged on the charging bottom seat, a
USB (universal serial
bus) interface and a power source interface are arranged on the side wall of the charging bottom seat, a storage battery is arranged at the
tail of the
steam generation device, a water inlet is formed in the top of the
steam generation device, a steam generation cavity, a
vaporization cavity and a steam channel are formed in the steam generation device, one end of the steam generation cavity is communicated with the water inlet, the other end of the steam generation cavity is communicated with one end of the
vaporization cavity, the other end of the
vaporization cavity is communicated with one end of the steam channel, the other end of the steam channel is arranged at the
tail of the steam generation device, a circle of exhaust holes communicated with the steam channel is formed in the side wall at the
tail of the steam generation device and surrounds the
whole body of the steam generation device, a steam generator is arranged in the steam generation cavity, an electrical heating tube is arranged in the vaporization cavity, and the electrical heating tube, the steam generator and the storage battery are sequentially connected in electrical mode through a guide wire. The simple humidifier is placed in a vessel which contains water in inverted mode, generates gas through the steam generation device, and thereby achieves humidification for air, and furthermore is simple and convenient to use, and convenient to carry.