A thermoplastic elastomer composition comprising the following components,, and, wherein the weight ratio of the component to the component is 0.1 or more and less than 1.5, Component: an ethylene random copolymer comprising a monomer unit derived from ethylene in amount of 50% by weight or more and 90% by weight or less when the total amount of the ethylene random copolymer is 100% by weight and a monomer unit derived from at least one monomer selected from the group consisting of α-olefins having a number of carbon atoms of 3 or more and 10 or less, Component: a polymer comprising over 50% by weight and 100% by weight or less of a monomer unit derived from propylene when the total amount of the polymer is 100% by weight, Component: a copolymer comprising an ethylene polymerization block and an ethylene-α-olefin copolymerization block, Component: an ethylene polymer comprising over 90% by weight and 100% by weight or less of a monomer unit derived from ethylene when the total amount of the ethylene polymer is 100% by weight, wherein a gel fraction of the component is over 10 % by weight, and wherein the gel fraction is measured with a Soxhlet extractor in which an extraction tube is connected to the lower part of a reflux condenser and a flask is connected to the lower part of the extraction tube; about 1 g of the thermoplastic elastomer composition and a net basket fabricated from wire mesh having a sieve opening of 400 mesh are weighed, respectively; the net basket into which the thermoplastic elastomer composition is put is introduced to the extraction tube; three hundred ml of o-xylene is introduced into the flask; the flask is heated, and o-xylene is reflexed for 24 hours to conduct extraction; after extraction, the net basket is removed from the extraction tube, and dried under reduced pressure at 100°C in a vacuum drying machine, and the net basket after drying is weighed, the gel fraction (% by weight) is calculated according to the following formula: gel fraction = weight of Y − weight of X / weight of A per 1 g of the thermoplastic elastomer × 100. the following components,, and, wherein the weight ratio of the component to the component is 0.1 or more and less than 1.5, Component: an ethylene random copolymer comprising a monomer unit derived from ethylene in amount of 50% by weight or more and 90% by weight or less when the total amount of the ethylene random copolymer is 100% by weight and a monomer unit derived from at least one monomer selected from the group consisting of α-olefins having a number of carbon atoms of 3 or more and 10 or less, Component: a polymer comprising over 50% by weight and 100% by weight or less of a monomer unit derived from propylene when the total amount of the polymer is 100% by weight, Component: a copolymer comprising an ethylene polymerization block and an ethylene-α-olefin copolymerization block, Component: an ethylene polymer comprising over 90% by weight and 100% by weight or less of a monomer unit derived from ethylene when the total amount of the ethylene polymer is 100% by weight, wherein a gel fraction of the component is over 10 % by weight, and wherein the gel fraction is measured with a Soxhlet extractor in which an extraction tube is connected to the lower part of a reflux condenser and a flask is connected to the lower part of the extraction tube; about 1 g of the thermoplastic elastomer composition and a net basket fabricated from wire mesh having a sieve opening of 400 mesh are weighed, respectively; the net basket into which the thermoplastic elastomer composition is put is introduced to the extraction tube; three hundred ml of o-xylene is introduced into the flask; the flask is heated, and o-xylene is reflexed for 24 hours to conduct extraction; after extraction, the net basket is removed from the extraction tube, and dried under reduced pressure at 100°C in a vacuum drying machine, and the net basket after drying is weighed, the gel fraction (% by weight) is calculated according to the following formula: gel fraction = weight of Y − weight of X / weight of A per 1 g of the thermoplastic elastomer × 100.