PRESSURE-SENSITIVE ADHESIVE COMPOSITION

An adhesive composition, includes a block copolymer (X) formed of a block (A) and a block (B), the block (A) having a glass transition temperature of 75°C or higher, the block (A) including a monomer unit having a first cyclic structure and a carboxyl group-containing monomer unit, the block (B) including 70% or more of an acrylic acid ester unit represented by General Formula (1); and a tackifier (Y) having a softening point of 120°C or higher and a second cyclic structure, in which a mass ratio of the block (A) to the block (B) (block (A)/block (B)) is 10/90 to 40/60, in an acid value of the block copolymer (X), an acid value derived from the block (A) is 8 mgKOH/g or more, at least one end of the block copolymer (X) is the block (A), a content of the tackifier (Y) is 5 to 40 parts by mass with respect to 100 parts by mass of the block copolymer (X), the General Formula (1) is CH 2 =CR 1 -COOR 2 , and R 1 represents a hydrogen atom, and R 2 represents a linear alkyl group or alkoxyalkyl group having 8 or less carbon atoms.