To prevent a wick structure inside from being pressed and damaged.

This method of manufacturing a heat pipe, includes a step for preparing a pipe body 1 and the wick structure 2, a step for disposing the wick structure 2 in the pipe body 1 and charging a working fluid while evacuating the inside of the pipe body 1, and a step for sealing the pipe body 1. According to these processes, the wick structure inside of the heat pipe can be prevented from being damaged by curving and pressing of the pipe body, and the heat pipe can be thinned. Further, flexibility and efficiency percentage in manufacturing the heat pipe can be improved.