The invention relates to a moving element. In a fuel battery system (20) which is arranged on a fuel battery vehicle used as the moving element of the invention, the water separated through a gas-liquid separator (38) arranged in a hydrogen supplying system and a gas-liquid separator (48) arranged in an air supplying system (40) is temporarily stored inside baffle grooves (62a to 62c) which are positioned at the internal side of a front wing board of the vehicle or the internal side of a front lever. The stored water is discharged from water outlets (64b and 64c) positioned at the front or the back of a front vehicle wheel which has a relatively vehicle driving wind or which is influenced by the movement of the vehicle. In order to reduce the possible influence of the driving wind to the water discharging, the vehicle is provided with an air flow path which ensures the discharged water flowing towards to the inclined back of the vehicle or which forms an air curtain of waste gas or air at the front of the discharged water. The arrangement effectively prevents the discharged water from curling by the driving wind for flying, thereby preventing the possible problems such that the discharged water is splashed onto other vehicles beside or behind.