To apply surely an adhesive to various kinds of finger parts by a method wherein adhesive paste liquid in which a main agent and a curing agent are automatically blended, is applied by spraying to a wood piece finger part.

When two-pack adhesive is applied to a finger part 21 consisting of a great number of angular notches formed on an edge part of a wood piece, a main agent 1 and a curing agent 2 are respectively sent in a static mixer or a mixing chamber. The main agent and the curing agent are blended to prepare an adhesive paste liquid 11. The adhesive paste liquid 11 is applied by spraying to the finger part 21 with an atomizer 6.