To provide an adhesive composition that shows excellent adhesion property to lumber not only of broadleaf tree but also of needleleaf tree causing adhesion trouble, has reduced smell and minimized environmental contamination, does not diffuse formaldehyde because the composition is an aqueous emulsion but includes no organic solvent, and has excellent workability, long-term adhesive properties, adhesion properties, resistance to water and resistance to boiling water. 広葉樹のみならず接着性に問題のある針葉樹等の難接着合板に対し優れた接着性を有し、水性エマルジョンであって有機溶剤を含まないため、臭気及び環境汚染が少なく、全くホルムアルデヒドを放散せず、作業性に優れ、可使時間が長い密着性、接着性、耐水性、耐煮沸性のある接着剤組成物の提供。 - 特許庁