Objective To introduce the surgical technique of applying free thenar perforator flap to repair soft tissue defects of the pulp and evaluate the clinical outcome.Methods From September 2009 to January 2011,13 cases of soft tissue defect of the pulp were treated with free thenar perforator flap.The size of the harvested flaps was between 4.7 cm × 3.0 cm to 2.0 cm × 2.0 cm.The flap was perfused by superficial palmar branch of the radial artery and its vascular network,while sensation of the flap was reconstructed via median nerve cutaneous branch or radial nerve superficial branch.According to caliber of the artery,blood vessels were anastomosed either in an end-to-end or end-to-side fashion.Results Vascular crisis occurred in 2 cases postoperatively,which were rescued by proper treatment.The other 11 transferred free flaps survived uneventfully.All cases were follow-up for 3 to 12 months.The appearance as well as texture of the flaps was satisfactory,except in one case the flap was bulky that required secondary debulking surgery.Sensation of the pulps recovered to S3 to S4.Conclusion The thenar flap based on superficial palmar branch of the radial artery and its vascular network is a good option to repair soft tissue defects of the pulp.It has superficial vascular pedicle which is easy to dissect,has abundant perforators,and has sensory nerve branched for sensory reconstruction.