The oxygen absorbent composition according to the present invention at least comprises a polyester oligomer containing a constituent unit having a specific tetralin ring, and a transition metal catalyst. The oxygen absorbent composition preferably further comprises a thermoplastic resin.本發明之氧吸收劑組成物至少含有:含有具有特定之四氫萘(tetralin)環之構成單元的聚酯寡聚物及過渡金屬觸媒。又,本發明之氧吸收劑組成物(Oxygen absorbent composition)較佳為進一步含有熱塑性樹脂。