To provide data transmission equipment capable of performing stable detection of synchronization by enhancing accuracy to follow a main wave even in a circumstance in which multi-path fading exists and enhancing accuracy to be synchronized with the main wave when the synchronization is made with a reflection wave first.

Correlation arithmetic operation values are calculated by sequentially shifting a sample point to start an arithmetic operation, a variable frequency clock generator of a receiver is controlled so that a sample point to take the maximum value is constantly put in a prescribed range based on a numeric value to indicate a position of the sample point to take the maximum value, when a numeric value to indicate the position of the sample point where the maximum value of the correlation arithmetic operation value is obtained exceeds a prescribed value, the value is restricted and the clock generator is controlled by the restricted value.