This paper reports a reconnaissance result of structural damage to school gymnasiums caused by the 2016 Kumamoto Earthquake. A total of 328 gymnasiums built in Kumamoto and Oita prefectures has been investigated. 55% of investigated gymnasiums were slightly damaged or not damaged while 17% of investigated gymnasiums were seriously damaged. In most of the seriously damaged gymnasiums, fracture of vertical braces as well as edge failure of concrete at column bases or steel roof joints were observed. Especially, edge failure of concrete at steel roof joints were dominant regardless of the construction year and whether seismic retrofit has been done.
