A turbo machine comprising: a cylindrical bearing housing ; a rotation shaft that is located in the bearing housing and includes a straight portion having a constant outer diameter; a bearing that is a plain bearing, that includes a non-tapered hole having a constant inner diameter and constituting a portion of the inner surface of the bearing that faces the straight portion of the rotation shaft , that is disposed between an inner surface of the bearing housing and an outer surface of the rotation shaft , that rotatably supports the rotation shaft at least in a radial direction of the rotation shaft , and that has one end in an axial direction of the bearing , the one end being located in the bearing housing ; a bearing holder that is fixed to one end of the bearing housing in the axial direction of the bearing and that faces the one end of the bearing ; and an end elastic body that is disposed between the one end of the bearing and the bearing holder in the axial direction of the bearing , that is in contact with the bearing and the bearing holder , and that is formed of a material having a lower modulus of elasticity than a material forming the bearing holder , wherein the rotation shaft includes a tapered portion having an outer diameter decreasing gradually toward an end of the rotation shaft , and the bearing includes a tapered hole having an inner diameter decreasing gradually toward the end of the rotation shaft and constituting a portion of the inner surface of the bearing that faces the tapered portion of the rotation shaft , and the bearing supports a load in the axial direction of the rotation shaft and the load in the radial direction of the rotation shaft . a cylindrical bearing housing ; a rotation shaft that is located in the bearing housing and includes a straight portion having a constant outer diameter; a bearing that is a plain bearing, that includes a non-tapered hole having a constant inner diameter and constituting a portion of the inner surface of the bearing that faces the straight portion of the rotation shaft , that is disposed between an inner surface of the bearing housing and an outer surface of the rotation shaft , that rotatably supports the rotation shaft at least in a radial direction of the rotation shaft , and that has one end in an axial direction of the bearing , the one end being located in the bearing housing ; a bearing holder that is fixed to one end of the bearing housing in the axial direction of the bearing and that faces the one end of the bearing ; and an end elastic body that is disposed between the one end of the bearing and the bearing holder in the axial direction of the bearing , that is in contact with the bearing and the bearing holder , and that is formed of a material having a lower modulus of elasticity than a material forming the bearing holder , wherein the rotation shaft includes a tapered portion having an outer diameter decreasing gradually toward an end of the rotation shaft , and the bearing includes a tapered hole having an inner diameter decreasing gradually toward the end of the rotation shaft and constituting a portion of the inner surface of the bearing that faces the tapered portion of the rotation shaft , and the bearing supports a load in the axial direction of the rotation shaft and the load in the radial direction of the rotation shaft . <EOS>