To increase the amount of paste applied on an object while preventing the scattering of the paste from the outside surface of a roller.

A paste applicator has the roller 1 to the outside surface of which the paste P is supplied and a transfer mechanism 3 for transferring the object w to a required position above the roller 1. A paste holding part 6 (13) which allows the entrance of at least a part of the object w and can hold the paste P is formed on the outside surface of the roller 1. The object w is immersed deeply in the paste P held by the holding part 6 (13), and a large amount of the paste P is applied on the object w.