To obtain an acrylic adhesive composition having high adhesive force to an adherend having low surface energy, low adhesive force to an adherend having high surface energy and excellent releasability.

The objective acrylic adhesive composition contains 100 pts.wt. of a reaction product produced by reacting an acrylic copolymer obtained by the copolymerization of an alkyl (meth)acrylate monomer containing ≥80 wt.% alkyl (meth)acrylate having an 8-12C alkyl group and 1-20 wt.% unsaturated monomer having a functional group copolymerizable with the above alkyl (meth) acrylate with a monofunctional long-chain alkyl compound having a 12-30C alkyl group and a functional group reactive with the above functional group in the acrylic copolymer at a ratio of 0.1-1 equivalent of the functional group of the alkyl compound based on 1 equivalent of the functional group of the acrylic copolymer, and 3-30 pts.wt. of a tackifier resin having a solubility parameter (SP value) of ≤8.6.