A method for producing a reversible thermosensitive recording medium, the method comprising: conveying an inlet sheet (10, 200, 300, 500) which includes inlets (7, 10, 10b, 10c, 100a, 100b) each of which has a convex-shaped electronic information recording element and an antenna circuit on a circuit board, retrieving positional information of the inlets (7, 10, 10b, 10c, 100a, 100b) by detecting the position of the inlets (7, 10, 10b, 10c, 100a, 100b) in the inlet sheet (10, 200, 300, 500), cutting the inlet sheet (10, 200, 300, 500) into individual inlets (7, 10, 10b, 10c, 100a, 100b) based on the positional information of the inlets (7, 10, 10b, 10c, 100a, 100b), retrieving positional information of the convex-shaped electronic information recording element in the individual inlets (7, 10, 10b, 10c, 100a, 100b) on a vacuum suction roller (25, 340) which is rotatable with the individual inlets (7, 10, 10b, 10c, 100a, 100b) being adsorbed on a surface thereof, conveying a base sheet (2, 50, 530, 230), which comprises a reversible thermosensitive recording layer and a plurality of concave portions (6, 50b) in a surface thereof opposite to a surface thereof on which the reversible thennosensitive recording layer is provided, toward the vacuum suction roller (25, 340), retrieving positional information of each of the concave portions (6, 50b) in the base sheet (2, 50, 530, 230) by detecting the position of the concave portion (6, 50b), aligning the convex-shaped electronic information recording element with the concave portion (6, 50b) based on the positional information of the convex-shaped electronic information recording element and the positional information of the concave portion (6, 50b), so that the convex-shaped electronic information recording element is inserted into the concave portion (6, 50b), and laminating the inlets (7, 10, 10b, 10c, 100a, 100b) and the base sheet (2, 50, 530, 230) by allowing the base sheet (2, 50, 530, 230) to pass between the vacuum suction roller (25, 340) and a lamination roller (7, 240) after the aligning. conveying an inlet sheet (10, 200, 300, 500) which includes inlets (7, 10, 10b, 10c, 100a, 100b) each of which has a convex-shaped electronic information recording element and an antenna circuit on a circuit board, retrieving positional information of the inlets (7, 10, 10b, 10c, 100a, 100b) by detecting the position of the inlets (7, 10, 10b, 10c, 100a, 100b) in the inlet sheet (10, 200, 300, 500), cutting the inlet sheet (10, 200, 300, 500) into individual inlets (7, 10, 10b, 10c, 100a, 100b) based on the positional information of the inlets (7, 10, 10b, 10c, 100a, 100b), retrieving positional information of the convex-shaped electronic information recording element in the individual inlets (7, 10, 10b, 10c, 100a, 100b) on a vacuum suction roller (25, 340) which is rotatable with the individual inlets (7, 10, 10b, 10c, 100a, 100b) being adsorbed on a surface thereof, conveying a base sheet (2, 50, 530, 230), which comprises a reversible thermosensitive recording layer and a plurality of concave portions (6, 50b) in a surface thereof opposite to a surface thereof on which the reversible thennosensitive recording layer is provided, toward the vacuum suction roller (25, 340), retrieving positional information of each of the concave portions (6, 50b) in the base sheet (2, 50, 530, 230) by detecting the position of the concave portion (6, 50b), aligning the convex-shaped electronic information recording element with the concave portion (6, 50b) based on the positional information of the convex-shaped electronic information recording element and the positional information of the concave portion (6, 50b), so that the convex-shaped electronic information recording element is inserted into the concave portion (6, 50b), and laminating the inlets (7, 10, 10b, 10c, 100a, 100b) and the base sheet (2, 50, 530, 230) by allowing the base sheet (2, 50, 530, 230) to pass between the vacuum suction roller (25, 340) and a lamination roller (7, 240) after the aligning.