PURPOSE: To provide a code lock body whereby an unlocking code can be changed easily and rapidly, missing of component parts is eliminated, transportation of ski board is facilitated, and the theft of ski board can be prevented surely.

CONSTITUTION: A code lock body 20 provided on a body case 2 of a ski board theft prevention wire lock comprises a cylinder 28, a lock pin inserted into the inserting groove of the cylinder 28, three inner rings 30 fitted closely on the cylinder 28, and a code ring 40 fitted closely on the outer periphery of each inner ring 30. Also the inner peripheral surface of the code ring 40 is divided into two parts by a plane crossed at right angle to an axial direction, and a lock part 41 is provided on the left side and an allowable part 42 is provided on the right side. Then the code ring 40 is rotated together with the inner ring 30 when a lock protrusion 33 of the inner ring 30 is positioned at a part to be locked 41, and rotated independently from the inner ring 33 when the lock protrusion 33 is positioned at the allowable part 42.