The present invention discloses a cable reel, which comprises a casing, a movable latch member pivotally coupled into the casing, a protrusion disposed at one end of the latch member, a turntable disposed under the latch member and pivotally coupled into the casing, a volute spring disposed on a turntable, a cable disposed in the in the turntable, and an adapter can be connected to one end or both ends of the cable. Further, the turntable has a groove, and an inclined guide groove and an arc indented groove are disposed proximate to the groove such that the protrusion on the latch member in conjunction with the inclined guide groove and the arc indented groove can fix the cable at the currently located position and will not retract the cable into the cable reel when the cable is pulled. On the other hand, the cable is pulled gently again if it is necessary to rewind the cable. The protrusion of the latch member will then be released and the cable around the turntable will be retracted automatically to the turntable. The present invention not only is simple to use, but also is easy to carry.