To provide a degassing composite hollow fiber membrane which does not occur the leakage of liquid chemicals during degassing, is excellent in solvent resistance and low elution property, and can suppress the production of foreign matter such as a crystalline molecule complex while keeping large permeability of gas such as oxygen or nitrogen even in the degassing composite hollow fiber membrane having large surface area in contact with ink liquid.

The degassing hollow fiber membrane includes a homogeneous membrane having gas permeability, and a porous support layer supporting the homogeneous membrane, wherein the amount of an oxidation inhibitor is 0.005 mass%.