An electric powered work vehicle comprising: a battery; a guide mechanism for movably guiding the battery while supporting it along a horizontal direction between a storage position at which the battery is accommodated in a vehicle body and a detachment position at which the battery is located away from the storage position along the horizontal direction to be detachable, wherein the guide mechanism supports the battery by supporting one and the other side face portions of the battery in the direction orthogonal to the moving direction of the battery by the guide mechanism along the horizontal direction; a holding mechanism configured to be automatically operated to a holding state capable of holding the battery at the storage position when the battery is moved to the storage position along the guide mechanism, wherein the holding mechanism is provided in the guide mechanism to act on both the one and other side face portions of the battery and the holding mechanism is provided at a portion of the guide mechanism at the detachment position; and a releasing operational portion manually operable to render the holding mechanism to a releasing state for allowing movement of the battery to the detachment position; Characterized in that there is provided a positioning portion for positioning the battery by acting on the battery located at the storage position, at a portion of this battery which is closer to the storage position than a center position of the battery in the moving direction of the battery by the guide mechanism; the positioning portion includes a pin disposed along the moving direction of the battery by the guide mechanism and an opening portion through which the pin is inserted/withdrawn along the moving direction of the battery by the guide mechanism; and the positioning portion is configured to position the battery in the direction orthogonal to the moving direction of the battery by the guide mechanism with the pin being inserted in the opening portion. a battery; a guide mechanism for movably guiding the battery while supporting it along a horizontal direction between a storage position at which the battery is accommodated in a vehicle body and a detachment position at which the battery is located away from the storage position along the horizontal direction to be detachable, wherein the guide mechanism supports the battery by supporting one and the other side face portions of the battery in the direction orthogonal to the moving direction of the battery by the guide mechanism along the horizontal direction; a holding mechanism configured to be automatically operated to a holding state capable of holding the battery at the storage position when the battery is moved to the storage position along the guide mechanism, wherein the holding mechanism is provided in the guide mechanism to act on both the one and other side face portions of the battery and the holding mechanism is provided at a portion of the guide mechanism at the detachment position; and a releasing operational portion manually operable to render the holding mechanism to a releasing state for allowing movement of the battery to the detachment position; Characterized in that there is provided a positioning portion for positioning the battery by acting on the battery located at the storage position, at a portion of this battery which is closer to the storage position than a center position of the battery in the moving direction of the battery by the guide mechanism; the positioning portion includes a pin disposed along the moving direction of the battery by the guide mechanism and an opening portion through which the pin is inserted/withdrawn along the moving direction of the battery by the guide mechanism; and the positioning portion is configured to position the battery in the direction orthogonal to the moving direction of the battery by the guide mechanism with the pin being inserted in the opening portion.