In this paper, static and dynamic collapse characteristics of an energy absorption element, which is made of an aluminum alloy, are estimated by quasi-static compressive tests and drop weight tests, and strain rates for compressive and bending deformation mode are derived from strain history of strain gauges. The first peak force in the force-length relationship of the dynamic test is different from that of the static test. Because a compressive deformation concentrates at an end of the specimen, and high strain rate occurs at the end of the specimen. The average force in the plateau region of the dynamic test is similar to that of the static test. Because bending deformation occurs in large area of the specimen, and the strain rate is sufficiently low.