Bending meshing type gear device

A bending meshing type gear device comprising:

• a wave generator;
• a bending gear bent and deformed by the wave generator;
• and
• a wave generator bearing disposed between the wave generator and the bending gear,
• wherein the wave generator bearing includes
• a first rolling element row in which a plurality of first rolling elements are aligned in a circumferential direction,
• a first holder that holds the plurality of first rolling elements,
• a second rolling element row disposed at a position offset in an axial direction from the first rolling element row, in which a plurality of second rolling elements are aligned in the circumferential direction, and
• a second holder that holds the plurality of second rolling elements,
• the first holder includes a plurality of first pockets, each of which accommodates each of the plurality of first rolling elements,
• the first pocket is open toward a side of the second rolling element row in the axial direction,
• the second holder includes a plurality of second pockets, each of which accommodates each of the plurality of second rolling elements,
• the second pocket is open toward a side of the first rolling element row in the axial direction, and
• a spacer member is disposed between the first rolling element row and the second rolling element row.