To investigate a new endoscopic transaxillary technique for release of the sternocleidomastoid (SCM) in congenital muscular torticollis (CMT). From May 2008 to March 2014, a total of 25 cases (male 7 and female 18), ranging in age from 14 to 31 years (mean age, 17.6 years), were operated for torticollis by endoscopic-assisted surgery. The sternal and clavicular attachments of the sternocleidomastoid were released by skin lift approach. The primary healing was achieved in all the 25 cases with no injury of major vessels or nerves. The patients were followed up for 6 months with satisfactory result and invisible scar. The subcutaneous endoscopic transaxillary and skin lift approach for the CMT provides good functional and cosmetic outcomes.