Oil passage structure for automatic transmission

An automatic transmission, comprising:

• an oil passage structure including
• a first member including a first wall that extends in a radial direction of a main shaft of the automatic transmission;
• a second member including a second wall that extends in the radial direction and is arranged to face the first wall from one side in an axial direction of the main shaft;
• and
• an oil passage constituted by a first groove formed on a surface of the first wall on the one side in the axial direction and extending in the radial direction, and a second groove formed on a surface of the second wall on another side in the axial direction and extending in the radial direction, wherein
• the first wall has a first recess on a surface on the other side in the axial direction, the first recess being recessed toward the one side in the axial direction,
• the second wall has a second recess on a surface on the one side in the axial direction, the second recess being located at a position different from the first recess in the radial direction and being recessed toward the other side in the axial direction,
• at least a portion of a first component is disposed in the first recess,
• at least a portion of a second component is disposed in the second recess, and
• in the oil passage, a second passage located at a position corresponding to the second recess in the radial direction is located on the other side in the axial direction relative to a first passage located at a position corresponding to the first recess in the radial direction.