An exhaust diffuser includes: a plurality of struts, each of which penetrates an internal cylinder and an external cylinder and couples a bearing support and a structural body together, the bearing support disposed inside the internal cylinder, the structural body disposed outside the external cylinder, each strut inclined rearward from the bearing support toward the structural body; and a plurality of strut covers that surround the plurality of struts, respectively, between the internal cylinder and the external cylinder. The external cylinder includes a tapered first stepped portion that expands a diameter of the external cylinder and that overlaps leading edges of the plurality of strut covers in an axial direction of the external cylinder. The internal cylinder includes a tapered second stepped portion that expands a diameter of the internal cylinder and that overlaps trailing edges of the plurality of strut covers in an axial direction of the internal cylinder.
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