A pressure-sensitive adhesive composition includes a block copolymer containing a polymer block (A) and a (meth)acrylic polymer block (B), wherein the polymer block (A) contains either or both of a maleimide compound and an amide group-containing vinyl compound as a constitutional monomer thereof and has a glass transition temperature of 100° C. or higher, and the (meth)acrylic polymer block (B) contains at least one selected from compounds represented by general formula (1) as a major constitutional monomer thereof and has a glass transition temperature of 10° C. or below.

CH2═CR1—C(═O)O(R2O)n—R3  (1)

(wherein, R1 represents hydrogen or a methyl group; R2 represents a linear or branched C2-6 alkylene group; R3 represents hydrogen, a C1-20 alkyl group, or a C6-20 aryl group; and n represents 0 or an integer from 1 to 100.)