A heat pipe having a wick structure for efficiently returning working fluid to an evaporating portion is provided. The heat pipe comprises a container 2 sealed at its both ends, a working fluid encapsulated in the container, and a wick structure 10 covering an inner face of the container. The wick structure 10 includes a porous wick 11 of a sintered metal powder, and a fiber wick 12 buried in the porous wick. A capillary pressure of the fiber wick 12 is weaker than that of the porous wick 11, and a pressure loss of the fiber wick 12 is smaller than that of the porous wick 11.