To provide an applicator for fat and oil which can apply viscous fat and oil uniformly on a work and automate application work.

An apparatus for applying fat and oil on a work 2 having through openings 1 is equipped with a fat-and-oil ejection head 3 which can be inserted into one through opening 1 and ejects fat and oil, a support part 4 which is installed upward/downward movably and supports the head 3, an oil passage 5 which is installed in the support part 4 and sends fat and oil to the head 3 by compressed air, and a vacuum apparatus which is arranged above the head 3 and can suck air from the other through opening 1.