Problem to be solved: to provide an oxygen releasing material which does not depend on the supply from the outside, and is an oxygen releasing material that does not produce toxic by-products.The present invention relates to an oxygen releasing material which contains a metal peroxide and a weak acid precursor capable of reacting with a metal peroxide or a weak acid precursor capable of inducing weak acid in advance.Diagram【課題】酸素発生に必要な物質を外部からの供給に依存しない自己反応性であり、かつ毒性の高い副生成物を生じない酸素徐放材を提供する。【解決手段】金属過酸化物と、金属過酸化物と反応し得る弱酸又は弱酸を誘導し得る弱酸前駆体とを予め内包し、自己反応性を備える酸素徐放材に関する。【選択図】図1