A pulse oximeter with a voice broadcast function for voice-broadcasting pulse rate-related information and blood oxygen level-related information is introduced. The pulse oximeter includes a pulse blood oxygen sensor, a signal processing circuit, and a loudspeaker. The pulse blood oxygen sensor senses a users pulse rate-related information and blood oxygen level-related information and sends a physiological signal carrying the pulse rate-related information and the blood oxygen level-related information. The signal processing circuit is electrically connected to the pulse blood oxygen sensor and adapted to receive and convert the physiological signal into the pulse rate-related information and the blood oxygen level-related information and send the pulse rate-related information and the blood oxygen level-related information. The loudspeaker is electrically connected to the signal processing circuit and adapted to receive and voice-broadcast the pulse rate-related information and the blood oxygen level-related information.
