A chain for continuously variable transmission wound around two pulleys (12, 14), the two pulleys (12, 14) having conical surfaces (24, 26, 34, 36) facing each other, the distance therebetween being variable, wherein: the chain comprises a plurality of chain elements interconnected in an endless manner; the chain element has a link unit having a plurality of plate-shaped links, each link having one or two openings (38a, 38b; 39) and being located along a circumferential direction of the chain, the plurality of links are arranged in a width direction of the chain, and two pins (42a, 42b) extending through the one or two openings (38a, 38b; 39) of the link at both ends of the link, respectively, and both ends of at least one of the two pins (42a, 42b) coming into contact with the conical surfaces (24, 26, 34, 36); the chain elements adjacent to each other in the chain circumferential direction are interconnected by allowing a pin (42a, 42b) of one chain element to pass through the opening (38a, 38b; 39) of the other chain element and vice versa, and when the chain bends, the contacting pins (42a, 42b) of the adjacent chain elements roll and contact; a relative action curve is defined as a relative shape of contact surfaces of the pins (42a, 42b) of the adjacent chain elements in a plane orthogonal to the width direction of the chain; and the relative action curve has a shape which causes a contact point between the pins (42a, 42b) to move toward the outer side of the moving chain as an inter-adjacent element angle (θ) which is a relative angle between the adjacent chain elements becomes larger; characterized in that the relative action curve further has a shape which has an increasing rate of an amount of movement (d) of the contact point with respect to the inter-adjacent element angle (θ), the increasing rate being, compared to when the relative action curve has an involute shape, smaller when the inter-adjacent element angle (θ) is small and being larger when the inter-adjacent element angle (θ) becomes larger; and when the inter-adjacent element angle is θ, a curvature radius of any point on the relative action curve is expressed by r 0 + r θ τ where τ>1, and r 0 and r are any real numbers. the chain comprises a plurality of chain elements interconnected in an endless manner; the chain element has a link unit having a plurality of plate-shaped links, each link having one or two openings (38a, 38b; 39) and being located along a circumferential direction of the chain, the plurality of links are arranged in a width direction of the chain, and two pins (42a, 42b) extending through the one or two openings (38a, 38b; 39) of the link at both ends of the link, respectively, and both ends of at least one of the two pins (42a, 42b) coming into contact with the conical surfaces (24, 26, 34, 36); a link unit having a plurality of plate-shaped links, each link having one or two openings (38a, 38b; 39) and being located along a circumferential direction of the chain, the plurality of links are arranged in a width direction of the chain, and two pins (42a, 42b) extending through the one or two openings (38a, 38b; 39) of the link at both ends of the link, respectively, and both ends of at least one of the two pins (42a, 42b) coming into contact with the conical surfaces (24, 26, 34, 36); the chain elements adjacent to each other in the chain circumferential direction are interconnected by allowing a pin (42a, 42b) of one chain element to pass through the opening (38a, 38b; 39) of the other chain element and vice versa, and when the chain bends, the contacting pins (42a, 42b) of the adjacent chain elements roll and contact; a relative action curve is defined as a relative shape of contact surfaces of the pins (42a, 42b) of the adjacent chain elements in a plane orthogonal to the width direction of the chain; and the relative action curve has a shape which causes a contact point between the pins (42a, 42b) to move toward the outer side of the moving chain as an inter-adjacent element angle (θ) which is a relative angle between the adjacent chain elements becomes larger; characterized in that the relative action curve further has a shape which has an increasing rate of an amount of movement (d) of the contact point with respect to the inter-adjacent element angle (θ), the increasing rate being, compared to when the relative action curve has an involute shape, smaller when the inter-adjacent element angle (θ) is small and being larger when the inter-adjacent element angle (θ) becomes larger; and when the inter-adjacent element angle is θ, a curvature radius of any point on the relative action curve is expressed by r 0 + r θ τ where τ>1, and r 0 and r are any real numbers.