AIRCRAFT GAS TURBINE

This aircraft gas turbine is provided with a rotor, a moving blade (24), a casing, a stationary blade (26), and a guide member (53). The moving blade (24) has fins (43) projecting from the outer peripheral surface (42a) of a moving blade shroud (42). A stationary blade shroud (51) of the stationary blade (26) forms a cavity (Ct) with at least the moving blade shroud (42) and the fins (43). The guide member (53) is provided inside the cavity (Ct) and extends inward from the radial outer side, and an inner-side end part (53a) on the radial inner side faces the outer peripheral surface (42a) of the moving blade shroud (42) with a gap therebetween.