Support Apparatus for Battery Pack and Electric Truck

A support apparatus for a battery pack being mounted under side rails constituting a ladder frame of a vehicle and including a pair of side faces, the side faces facing outward in a vehicle width direction. The support apparatus has a battery-side bracket that includes an opposing face facing the side face and accommodates the battery pack and a frame-side bracket coupling the battery-side bracket to the side rail. The battery-side bracket has a device mounting unit for mounting an on-board device at an outer face opposite to the opposing face.