A stationary-blade-type rotating machine comprising: a rotational shaft; an impeller mounted to the rotational shaft; an impeller housing accommodating the impeller and having therein a scroll passage formed on an outer peripheral side of the impeller; a bearing housing accommodating a bearing which rotatably supports the rotational shaft and connected to the impeller housing in an axial direction of the rotational shaft; a stationary blade disposed in a radial passage formed between the scroll passage and the impeller, the radial passage being defined by an impeller-housing-side member and a bearing-housing-side member which face each other in the axial direction of the rotational shaft; and a fixation unit pressing and thereby fixing the stationary blade to the impeller housing, wherein the fixation unit includes: an annular circumferential groove disposed in an inner peripheral surface of the impeller housing; and a ring-shaped fitting member subjected to a force to expand in a radial direction while being fitted into the circumferential groove, the fitting member being configured to press the stationary blade to the impeller housing via the bearing-housing-side member, wherein the bearing-housing-side member is composed of a bearing-side plate member formed separately from the impeller housing and from the bearing housing, wherein the fitting member is configured to press the stationary blade to the impeller housing via the bearing-side plate member, wherein the impeller-housing-side member is composed of a shroud part which is a part of the impeller housing, and wherein the fitting member is configured so that an inner peripheral part located on an inner peripheral side of an outer peripheral part of the fitting member abuts on the bearing-side plate member, and the stationary blade is pressed to the shroud part via the bearing-side plate member, in a state where the outer peripheral part of the fitting member is fitted into the circumferential groove, characterized in that the circumferential groove is disposed on a bearing housing side with respect to the bearing-side plate member. a rotational shaft; an impeller mounted to the rotational shaft; an impeller housing accommodating the impeller and having therein a scroll passage formed on an outer peripheral side of the impeller; a bearing housing accommodating a bearing which rotatably supports the rotational shaft and connected to the impeller housing in an axial direction of the rotational shaft; a stationary blade disposed in a radial passage formed between the scroll passage and the impeller, the radial passage being defined by an impeller-housing-side member and a bearing-housing-side member which face each other in the axial direction of the rotational shaft; and a fixation unit pressing and thereby fixing the stationary blade to the impeller housing, wherein the fixation unit includes: an annular circumferential groove disposed in an inner peripheral surface of the impeller housing; and a ring-shaped fitting member subjected to a force to expand in a radial direction while being fitted into the circumferential groove, the fitting member being configured to press the stationary blade to the impeller housing via the bearing-housing-side member, an annular circumferential groove disposed in an inner peripheral surface of the impeller housing; and a ring-shaped fitting member subjected to a force to expand in a radial direction while being fitted into the circumferential groove, the fitting member being configured to press the stationary blade to the impeller housing via the bearing-housing-side member, wherein the bearing-housing-side member is composed of a bearing-side plate member formed separately from the impeller housing and from the bearing housing, wherein the fitting member is configured to press the stationary blade to the impeller housing via the bearing-side plate member, wherein the impeller-housing-side member is composed of a shroud part which is a part of the impeller housing, and wherein the fitting member is configured so that an inner peripheral part located on an inner peripheral side of an outer peripheral part of the fitting member abuts on the bearing-side plate member, and the stationary blade is pressed to the shroud part via the bearing-side plate member, in a state where the outer peripheral part of the fitting member is fitted into the circumferential groove, characterized in that the circumferential groove is disposed on a bearing housing side with respect to the bearing-side plate member.