To provide an adhesive layer having excellent adhesive force and holding force when pasting members together after long-term storage and, further, having excellent shear strength after curing.SOLUTION: An adhesive layer is formed from an adhesive composition [I] comprising a carboxyl group-containing acrylic resin (A), an epoxy-based compound (B), and a curing agent (C) of the epoxy-based compound (B), where a difference between a gel fraction (G2) after standing for 4 weeks under a dry atmosphere of 40 degrees centigrade and a gel fraction (G1) before standing is 30 percent or less.SELECTED DRAWING: None

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