A collision energy absorption column (1) is provided on an end side of a railroad vehicle structure (2) and extends from an end beam (72) toward a roof structure (20). The collision energy absorption column (1) includes a outer member (3) made of metal having a transverse cross section thereof of a channel shape or a hollow shape, and a inner member (4) made of reinforced plastic provided along an inner circumference of the outer member (3) and extending in parallel with the outer member (3). The outer member (3) is configured by joining two column halves (6) extending along a column axis after arranging the two column halves (6) are arranged in a direction perpendicular to the column axis of the outer member (3). The joined part of the column halves (6) extends along the column axis. The outer member (3) is coupled to the end beam (72) and the roof structure (20) by a fastener. The inner member (4) extends between the end beam (72) and a lower part of the roof structure (20), excluding the fastening parts.