To provide an oxide superconductive wire in which infiltration of moisture into an oxide superconducting layer can be reduced, and to provide a production method therefor.

The production method of an oxide superconductive wire 10 includes a first step for preparing a superconducting laminate S0 where a substrate 1, an intermediate layer 2, an oxide superconducting layer 3, a silver layer 4 and a metal stabilization layer 6 are laminated in this order, and a second step for forming a melting solidification layer 7 covering at least the side surface of the oxide superconducting layer 3 by melting and solidifying the end of the superconducting laminate S0 by irradiating the end thereof in the width direction with a laser L.