An impact absorbing structure for absorbing an impact received in a predetermined direction, the impact absorbing structure comprising: a plurality of impact absorbing members (11A-D), each of which is constituted by a tubular-shaped body whose longitudinal central axis is arranged along the impact direction, wherein the plurality of impact absorbing members (11A-D) are arranged so as to be capable of absorbing the impact by being compressively collapsed when receiving the impact from the impact direction; a core member including a core main body portion and a filling portion, wherein the core main body portion is placed between adjacent impact absorbing members (11A-D), the filling portion is placed at a region which is at a front end of the impact absorbing members (11A-D) with respect to the impact direction, and the core main body portion is integral with the filling portion; a pair of face plates between which the core member and the impact absorbing members (11A-D) are held; wherein at least one of the plurality of impact absorbing members (11A-D) is arranged such that the front end of the at least one impact absorbing member (11A-D) with respect to the impact direction is placed at a different position than the front end(s) of the other impact absorbing member(s) (11A-D) with respect to the impact direction, and such that the front end of the at least one impact absorbing member (11A-D) is further forward in the impact direction than the front end(s) of the other impact absorbing member(s) (11A-D) such that the collapse of the impact absorbing member(s) (11A-D) upon an impact in the impact direction will start at a different timing, characterised in that the core member is formed in a honeycomb structure, and in that the impact absorbing structure further comprises a collapse assisting device (75;76;77) that assists collapsing of the core member, the collapse assisting device (75;76;77) being placed on the core member and on the side forward in the impact direction so as to cut into the core member in the impact direction upon an impact. a plurality of impact absorbing members (11A-D), each of which is constituted by a tubular-shaped body whose longitudinal central axis is arranged along the impact direction, wherein the plurality of impact absorbing members (11A-D) are arranged so as to be capable of absorbing the impact by being compressively collapsed when receiving the impact from the impact direction; a core member including a core main body portion and a filling portion, wherein the core main body portion is placed between adjacent impact absorbing members (11A-D), the filling portion is placed at a region which is at a front end of the impact absorbing members (11A-D) with respect to the impact direction, and the core main body portion is integral with the filling portion; a pair of face plates between which the core member and the impact absorbing members (11A-D) are held; wherein at least one of the plurality of impact absorbing members (11A-D) is arranged such that the front end of the at least one impact absorbing member (11A-D) with respect to the impact direction is placed at a different position than the front end(s) of the other impact absorbing member(s) (11A-D) with respect to the impact direction, and such that the front end of the at least one impact absorbing member (11A-D) is further forward in the impact direction than the front end(s) of the other impact absorbing member(s) (11A-D) such that the collapse of the impact absorbing member(s) (11A-D) upon an impact in the impact direction will start at a different timing,