An air permeable elastic laminate and a fabricating method thereof are disclosed. At least two materials having different elasticity coefficients are combined to form an elastic laminate. A thermal melting processing technique is utilized to perform a local thermal treatment to the elastic laminate so as to form a plurality of hardened parts on the elastic laminate. A stretch stress is applied to the elastic laminate in order to break the hardened parts. The elastic laminate is elastically recovered after the stretch stress is released. The air permeability is provided to the elastic laminate through the broken hardened parts, and the unhardened parts on the elastic laminate still have elasticity.