Oxygen absorption resin composition

An oxygen absorption resin composition comprising:

• a thermoplastic resin (A) having carbon-carbon double bonds substantially in its main chain, wherein the thermoplastic resin (A) is represented by a formula (III):
• wherein R7 and R8 are each independently a hydrogen atom, an alkyl group that may be substituted, an aryl group that may be substituted, an alkylaryl group that may be substituted, —COOR9, —OCOR10, a cyano group or a halogen atom, and R9 and R10 are each independently a hydrogen atom, or an alkyl group having 1 to 10 carbon atoms;
• a transition metal salt (B), and
• a gas barrier resin (C),
• wherein the thermoplastic resin (A) satisfies the following inequality (1):
• 100×b/(a+b)≦X (1)
• wherein a (mol/g) is an amount of carbon-carbon double bonds in its main chain, b (mol/g) is an amount of carbon-carbon double bonds in its side chain, and X is 10,
• wherein the oxygen absorption amount of the thermoplastic resin (A) is at least 1.6 moles per 1 mol of carbon·carbon double bonds of the thermoplastic resin (A), and
• wherein the gas barrier resin (C) is a polyvinyl alcohol resin having an oxygen transmission rate of 20 ml·20 μm(m2·day·atm) or less in 65% RH at 20° C.