To provide a pipe-shaped column having an excellent impact energy absorbing ability as well as offering excellent appearance and suppressing its production cost.

A circular steel pipe 20 is erected on a base plate 10 of a pipe-shaped column 100, and a long vertical slit 50 is formed in a pipe shaft direction reaching to a bottom end 23 penetrating through a side wall at an outer road side. Therefore, if an impact load capable of knocking down the pipe-shaped column 100 is applied toward the side of the vertical slit 50, then a center width of the vertical slit 50 in the longitudinal slit 50 is enlarged, and its side edge is bent almost to a doglegged shape toward its outer side and then it is soon deformed nearly to a shape of . Therefore, the periphery of the side edge is sufficiently subjected to a plastic deformation. Thus, the surrounding of the side edge is sufficiently subjected to a plastic deformation, and then a sufficient amount of impact energy can be absorbed.