To provide a fluid coater which can perform reduction of an unstable region of film thickness in a coating starting region by fixing a coating head with improved handling characteristics which can adjust an effluent condition from a gap of a slit-like opening part and can be surely assembled.

A fluid coater for performing coating while a coating head with a slit-like opening part 4a with the whole length coinciding approximately with the dimension of the outer shape of a base sheet 10 being an object for coating is relatively moved to the base sheet 10 being an object for coating so as to intersect approximately the longer direction of the opening part 4a at right angles in order to make a fluid to be applied flow out by a specified thickness on the plane base sheet 10 being an object for coating, is provided and the coating head is made of a laminated structure consisting of the first block 2 provided with a hollow part 3 introducing the coating fluid through a fluid inlet 16 and spreading it in the longer direction of the opening part 4a, a fulid suction hole 17 for suction at a specified negative pressure and the first bonding face 2a and the second block 7 bonded to the second bonding face 7a through a shim member 6 and a plurality of projecting parts 6b are formed on the shim member 6.