Fuel tank fixing structure

The invention provides a fuel tank fixing structure which can prevent contacting among a vehicle body and the fuel tank and a functional component when a collision occurs, thereby realizing no easy transmission of shake sound caused by fuel shaking to a compartment. A fixing belt (62) extends in the front-and-back direction of the vehicle along the lower surface of a fuel tank (40) and is connected with an upper beam (20), and fixes the fuel tank (40) in a state that the fuel tank (40) is pressed to the upper beam (20). The functional component (50) is configured at the lower side than the upper end (21) of the upper beam (20). A space (S) is formed between a ground panel (30) and the upper end (21) of the upper beam (20). 提供一种燃料箱的固定结构，能够防止在发生碰撞时车体接触燃料箱和功能部件，能够使因燃料的晃动而产生的晃动声不易传递到车厢。固定带(62)沿着燃料箱(40)的下表面在车辆前后方向上延伸，连结于上梁(20)，在燃料箱(40)被按压于上梁(20)的状态下固定燃料箱(40)。功能部件(50)与上梁(20)的上端部(21)相比配置在下侧。在地板面板(30)与上梁(20)的上端部(21)之间形成有空间(S)。