A hands-free mobile phone includes a housing and a hands-free unit. The housing defines two outer slide channels and two inner slide channels inside the corresponding outer slide channels. Each outer slide channel includes an access hole, a pivot hole, and a coupling passage communicating the access hole with the pivot hole. Two pivot portions are formed on the hands-free unit. Each pivot portion includes a pivot shaft and a plugging end formed on the pivot shaft. The plugging ends of the pivot portions are respectively inserted in the inner slide channels through the access holes of the corresponding outer slide channels and the pivot shafts thereof are respectively placed in the corresponding access holes and slid into the pivot holes of the outer slide channels through the corresponding coupling passages. Thus, the hands-free unit is pivotably secured to the housing via pivot of the pivot portions.