The present disclosure discloses a fingerprint sensor and a fingerprint identification module. The fingerprint sensor comprises a substrate and an ultrasonic transducer. The upper surface of the substrate is provided with a plurality of first connecting electrodes, wherein the lower surface of the substrate is provided with a plurality of second connecting electrodes, and wherein the first connecting electrodes are configured to electrically connect with the second electrodes. The ultrasonic transducer is provided on the upper surface, wherein the ultrasonic transducer comprises a plurality of third connecting electrodes, and wherein the third connecting electrodes are configured to electrically connect with the first connecting electrodes.