A gas tank-equipped vehicle equipped with a plurality of gas tanks includes: a vehicle body; a first gas tank disposed with a longitudinal direction thereof along a front-rear direction of the gas tank-equipped vehicle; a second gas tank that is disposed closer to the rear of the gas tank-equipped vehicle than the first gas tank is, and disposed with a longitudinal direction thereof along a left-right direction of the gas tank-equipped vehicle; a first mounting mechanism by which the first gas tank is mounted to the vehicle body; and a plurality of tank bands wound around the second gas tank to mount the second gas tank to the vehicle body.