Chassis cab vehicle

A chassis cab vehicle comprising:

• a lower frame, which constitutes a lower structure of the chassis cab vehicle and is equipped with a pair of side members extending in a lengthwise direction of the chassis cab vehicle;
• a battery coupled between the side members;
• and
• an upper body, which is coupled to a front portion of the lower frame to form a cabin interior, wherein a side sill is formed at a lower end at each side of the upper body and extends to a rear of the cabin interior, and wherein the side sills overlap the respective side members in a lateral direction of the chassis cab vehicle when coupled to the lower frame.