A portable ultrasound height measuring apparatus, which comprises a display module and a measuring module. Wherein the display module comprises a LCD, a speaker, a transparent plank and a skidproof pad. The measuring module comprises an ultrasound emitter, an ultrasound receiver, a start button, a set fingerboard, and under the set fingerboard a microprocessor. The apparatus measures height of measured person by emitting an ultrasound signal from the emitter and receiving a reflecting signal by the receiver, then displays value on the LCD. The display module and measuring module are jointly connected together to make the display module able to rotate, open, and close in a set range of angle relative to the measuring module.