A connector holding structure is provided with a plurality of connectors to be connected to a plurality of mating connectors arranged in an arrangement direction, a plurality of wires drawn out from the plurality of connectors, and a connector holding member including a plurality of connector mounting portions for respectively holding the plurality of connectors, the connector holding member collectively holding the plurality of connectors. The connector holding member includes a deflectable and deformable flexible portion between adjacent ones of the plurality of connector mounting portions.