An electric connection structure comprising: a glass plate; a power supply member formed on the glass plate; a terminal (20, 60, 70, 80) having a base portion (21, 81) which is opposed to the glass plate; and a spring member (35, 45, 50, 85) which is made of a conductor and disposed between the power supply member and the base portion (21, 81), and an adhesive layer (30, 83) which bonds at least one of the glass plate and the power supply member to the base portion (21, 81), wherein: the power supply member and the base portion (21, 81) contact with the spring member (35, 45, 50 85), thereby establishing electric continuity between the power supply member and the base portion (21, 81) via the spring member (35, 45, 50, 85), characterized in that the spring member (35, 45, 50, 85) is formed into a plate-like shape extending in a first direction, and a central portion in the first direction of the spring member (35, 45, 50, 85) is curved so as to be convex in a thickness direction of the glass plate so that the spring member (35, 45, 50, 85) has a curved portion, the central portion of the curved portion being in contact with the power supply member and two end portions of the curved portion in the first direction being in contact with the base portion (21, 81), the spring member (35, 45, 50, 85) has two flat portions which extend in the first direction from two respective sets of end portions in the first direction of the curved portions, and the base portion (21, 81) is formed into a plate-like shape; and projection portions (24, 25, 61, 62, 71) which project from a major surface of the base portion (21, 81), are in contact with at least one of the glass plate and the power supply member, and prevent the spring member (35, 45, 50, 85) interposed between the power supply member and the base portion (21, 81) from deforming to a prescribed degree or more. a glass plate; a power supply member formed on the glass plate; a terminal (20, 60, 70, 80) having a base portion (21, 81) which is opposed to the glass plate; and a spring member (35, 45, 50, 85) which is made of a conductor and disposed between the power supply member and the base portion (21, 81), and an adhesive layer (30, 83) which bonds at least one of the glass plate and the power supply member to the base portion (21, 81), wherein: the power supply member and the base portion (21, 81) contact with the spring member (35, 45, 50 85), thereby establishing electric continuity between the power supply member and the base portion (21, 81) via the spring member (35, 45, 50, 85), characterized in that the spring member (35, 45, 50, 85) is formed into a plate-like shape extending in a first direction, and a central portion in the first direction of the spring member (35, 45, 50, 85) is curved so as to be convex in a thickness direction of the glass plate so that the spring member (35, 45, 50, 85) has a curved portion, the central portion of the curved portion being in contact with the power supply member and two end portions of the curved portion in the first direction being in contact with the base portion (21, 81), the spring member (35, 45, 50, 85) has two flat portions which extend in the first direction from two respective sets of end portions in the first direction of the curved portions, and the base portion (21, 81) is formed into a plate-like shape; and the power supply member and the base portion (21, 81) contact with the spring member (35, 45, 50 85), thereby establishing electric continuity between the power supply member and the base portion (21, 81) via the spring member (35, 45, 50, 85), characterized in that the spring member (35, 45, 50, 85) is formed into a plate-like shape extending in a first direction, and a central portion in the first direction of the spring member (35, 45, 50, 85) is curved so as to be convex in a thickness direction of the glass plate so that the spring member (35, 45, 50, 85) has a curved portion, the central portion of the curved portion being in contact with the power supply member and two end portions of the curved portion in the first direction being in contact with the base portion (21, 81), the spring member (35, 45, 50, 85) has two flat portions which extend in the first direction from two respective sets of end portions in the first direction of the curved portions, and the base portion (21, 81) is formed into a plate-like shape; and projection portions (24, 25, 61, 62, 71) which project from a major surface of the base portion (21, 81), are in contact with at least one of the glass plate and the power supply member, and prevent the spring member (35, 45, 50, 85) interposed between the power supply member and the base portion (21, 81) from deforming to a prescribed degree or more.