A method for producing a member (1) for fluid machines, which comprises: a coating step (S4) wherein a glass-based material is applied to the surface of a base (2); a smoothing step (S5) wherein some of the glass-based material is removed, while heating and melting the glass-based material after the coating step (S4); and a solidification step (S6) wherein the heated and melted glass-based material is solidified after the smoothing step (S5), and a member for fluid machines, are provided.