A ukulele includes a ukulele main body and a circuit board. The ukulele main body includes a head, strings, a fret board, and a body. A front surface of the body is provided with a saddle and a bridge. The circuit board is disposed in the body. The circuit board includes a power supply module, a Bluetooth audio input module, a pickup module, a mixing module, and an audio output module. The ukulele can be played in conjunction with a smart phone accompaniment and ensure the timbre of playing.