An arrangement structure for a charging port cover includes a charging port (15) having a charging inlet (21) in a charging port opening portion (17) provided on a vehicle body, and a lid (7) that covers the charging port opening portion and is openable and closable on the vehicle body. The arrangement structure further includes a charging port cover (35) attached to the lid in an opened state to cover open sections (16, 18) between the charging port opening portion and the lid. The lid is fixed to the vehicle body by hinges (5) in an openable and closable manner. The open sections are located in side portions of the lid and the charging port opening portion in an axis direction (X) of the hinges and in a front portion in a direction (Y) orthogonal to the axis direction of the hinges.