A method for producing a laminate, comprising integrally molding cylindrical expanded thermoplastic resin beads A having a through-hole and an aspect ratio L/D of less than 2 and cylindrical expanded thermoplastic resin beads B having a through-hole and an aspect ratio L/D of less than 2, wherein the laminate is a laminate in which an expanded beads molded article (a) composed of the expanded beads A and having interconnected voids and an expanded beads molded article (b) composed of the expanded beads B and having interconnected voids are integrally laminated, a difference [P b - P a] between a voidage (P a) of the expanded beads molded article (a) and a voidage (P b) of the expanded beads molded article (b) is 5% or more, and the expanded beads A and the expanded beads B satisfy the following requirements to: a difference [d B - d A] between an average hole diameter d A of the through-holes of the expanded beads A and an average hole diameter d B of the through-holes of the expanded beads B is 0.3 mm or more and 2 mm or less; the expanded beads B have an average outer diameter D B of 3.5 mm or more and 5 mm or less; a difference [D B - D A] between an average outer diameter D A of the expanded beads A and an average outer diameter D B of the expanded beads B is -0.3 mm or more and 2 mm or less, the aspect ratio, the voidage, the average hole diameter and the average outer diameter being measured as described in the description. wherein the laminate is a laminate in which an expanded beads molded article (a) composed of the expanded beads A and having interconnected voids and an expanded beads molded article (b) composed of the expanded beads B and having interconnected voids are integrally laminated, a difference [P b - P a] between a voidage (P a) of the expanded beads molded article (a) and a voidage (P b) of the expanded beads molded article (b) is 5% or more, and the expanded beads A and the expanded beads B satisfy the following requirements to: a difference [d B - d A] between an average hole diameter d A of the through-holes of the expanded beads A and an average hole diameter d B of the through-holes of the expanded beads B is 0.3 mm or more and 2 mm or less; the expanded beads B have an average outer diameter D B of 3.5 mm or more and 5 mm or less; a difference [D B - D A] between an average outer diameter D A of the expanded beads A and an average outer diameter D B of the expanded beads B is -0.3 mm or more and 2 mm or less, the aspect ratio, the voidage, the average hole diameter and the average outer diameter being measured as described in the description. a difference [d B - d A] between an average hole diameter d A of the through-holes of the expanded beads A and an average hole diameter d B of the through-holes of the expanded beads B is 0.3 mm or more and 2 mm or less; the expanded beads B have an average outer diameter D B of 3.5 mm or more and 5 mm or less; a difference [D B - D A] between an average outer diameter D A of the expanded beads A and an average outer diameter D B of the expanded beads B is -0.3 mm or more and 2 mm or less, the aspect ratio, the voidage, the average hole diameter and the average outer diameter being measured as described in the description.