A liquid coating device comprising: a dipping means that dips an object (9, 9a) to be coated, the object having a long length, into liquid to coat the liquid on a surface of the object; a conveying means that conveys the object (9, 9a) at a predetermined speed, the object (9, 9a) coated by the dipping means being vertically lifted upward from a surface of the liquid; a load applying means that applies a predetermined load to the object (9, 9a) conveyed by the conveying means, the load applying means being disposed at an upstream side of the dipping means along an object conveying path when a side of the object conveying path in which the object enters the dipping means is set to be the upstream side and a side of the object conveying path in which the object is discharged from the dipping means is set to be a downstream side; a drying means that dries the object on which the liquid is applied; a cooling means that cools the dried object; a conveying speed measurement means that measures a conveying speed of the object; a control portion that controls the conveying means based on a measurement result of the conveying speed measurement means; the liquid coating device being characterised in that the liquid coating device comprises a motor driven fan equipped with a discharging port; a chamber that applies the liquid to the object and contains at least the dipping means, the drying means and the cooling means, wherein the chamber includes the discharging port that is communicated to an outside of the chamber and discharges hot air within the chamber to the outside of the chamber when the motor and the fan rotate. a dipping means that dips an object (9, 9a) to be coated, the object having a long length, into liquid to coat the liquid on a surface of the object; a conveying means that conveys the object (9, 9a) at a predetermined speed, the object (9, 9a) coated by the dipping means being vertically lifted upward from a surface of the liquid; a load applying means that applies a predetermined load to the object (9, 9a) conveyed by the conveying means, the load applying means being disposed at an upstream side of the dipping means along an object conveying path when a side of the object conveying path in which the object enters the dipping means is set to be the upstream side and a side of the object conveying path in which the object is discharged from the dipping means is set to be a downstream side; a drying means that dries the object on which the liquid is applied; a cooling means that cools the dried object; a conveying speed measurement means that measures a conveying speed of the object; a control portion that controls the conveying means based on a measurement result of the conveying speed measurement means; the liquid coating device being characterised in that the liquid coating device comprises a motor driven fan equipped with a discharging port; a chamber that applies the liquid to the object and contains at least the dipping means, the drying means and the cooling means, wherein the chamber includes the discharging port that is communicated to an outside of the chamber and discharges hot air within the chamber to the outside of the chamber when the motor and the fan rotate.