A multilayer tube, which comprises two or more layers containing a layer (a) and a layer (b); wherein the layer (a) contains an aliphatic polyamide composition; the layer (b) contains a modified polyolefin; the aliphatic polyamide composition contains a polyamide and an elastomer polymer; the polyamide is an aliphatic polyamide having a ratio of a number of methylene groups to a number of amide groups of 7.0 or more, and is contained in the aliphatic polyamide composition in an amount of 70 mass% or more and 90 mass% or less; the elastomer polymer has a constituent unit derived from an unsaturated compound having a carboxyl group and/or an acid anhydride group, and is contained in the aliphatic polyamide composition in an amount of 5 mass% or more and 30 mass% or less; the aliphatic polyamide composition may contain a plasticizer; the plasticizer has no sulfur atom, and has an ester structure of p- and/or o-hydroxybenzoic acid and a linear and/or branched alkylaliphatic alcohol having alcohol having a carbon atom number of 12 to 24, and the content of the plasticizer in the aliphatic polyamide composition is 0 mass% or more and 15 mass% or less; the aliphatic polyamide composition has a bending elastic modulus of 400 MPa or more and 1,000 MPa or less as measured in compliance with ISO 178; the modified polyolefin has a unit derived from a monomer based on an α-olefin having a carbon atom number of 2 to 10, and has a melting point of 130°C or more as measured in compliance with ISO 11357-3; in the multilayer tube, the layer (a) and the layer (b) are arranged in the order from the outside to the inside of the multilayer tube; and the thickness of the layer (a) occupies 60% or more of the total thickness of the tube. the layer (a) contains an aliphatic polyamide composition; the layer (b) contains a modified polyolefin; the aliphatic polyamide composition contains a polyamide and an elastomer polymer; the polyamide is an aliphatic polyamide having a ratio of a number of methylene groups to a number of amide groups of 7.0 or more, and is contained in the aliphatic polyamide composition in an amount of 70 mass% or more and 90 mass% or less; the elastomer polymer has a constituent unit derived from an unsaturated compound having a carboxyl group and/or an acid anhydride group, and is contained in the aliphatic polyamide composition in an amount of 5 mass% or more and 30 mass% or less; the aliphatic polyamide composition may contain a plasticizer; the plasticizer has no sulfur atom, and has an ester structure of p- and/or o-hydroxybenzoic acid and a linear and/or branched alkylaliphatic alcohol having alcohol having a carbon atom number of 12 to 24, and the content of the plasticizer in the aliphatic polyamide composition is 0 mass% or more and 15 mass% or less; the aliphatic polyamide composition has a bending elastic modulus of 400 MPa or more and 1,000 MPa or less as measured in compliance with ISO 178; the modified polyolefin has a unit derived from a monomer based on an α-olefin having a carbon atom number of 2 to 10, and has a melting point of 130°C or more as measured in compliance with ISO 11357-3; in the multilayer tube, the layer (a) and the layer (b) are arranged in the order from the outside to the inside of the multilayer tube; and the thickness of the layer (a) occupies 60% or more of the total thickness of the tube.