A pin for heat exchanger is provided that the exhaustion of the condensed water can be smoothly ejected. A pin for heat exchanger(10) comprises a slant part(30) which is formed to be inclined about the tube surface, and a joint which contacts to the tube surface while being parallel to the tube surface and having the predetermined length. The slant part and junction are formed In order to be by turns successively continued. The adjacent oblique side part of the height direction is formed in order to be inclined to the opposite direction.
