Oil storage structure of transmission case

An oil storage structure of a transmission case, the oil storage structure comprising:

• an oil pan that closes a lower opening of the transmission case and forms an oil pool in a lower space inside the transmission case;
• and
• a strainer having a suction port for oil located in the oil pool, wherein
• the suction port for the oil is provided so as to face a bottom wall portion of the oil pan with a first gap in between;
• the bottom wall portion of the oil pan is provided with a protruding portion protruding toward the suction port, with the protruding portion being formed in a direction across the suction port as viewed from the bottom wall portion;
• the bottom wall portion of the oil pan is provided with a facing portion that faces the suction port of the strainer with a second gap in between, and bulges in a direction away from the suction port, thereby deepening the oil pool;
• and
• the protruding portion is provided on the facing portion,
• wherein the suction port has a rectangular shape or an oval shape, and has longitudinal sides extending in a vehicle width direction of a vehicle including the transmission case, and
• the protruding portion of the bottom wall portion is arranged across the suction port in a shorter side direction of the suction port as viewed from the bottom wall portion.