A current collector comprising: a conductive substrate, and a resin layer provided on one side or both sides of the conductive substrate; wherein: the conductive substrate is an aluminum alloy foil obtained by subjecting an aluminum alloy cast ingot comprising 0.03 to 1.0 mass% of Fe, 0.01 to 0.3 mass% of Si, 0.0001 to 0.2 mass% of Cu, with the rest consisting of Al and unavoidable impurities, wherein an amount of each of the unavoidable impurities is 0.02% or less, and a total amount thereof is 0.15% or less, to a homogenizing treatment at 550 to 620°C for 1 to 20 hours, followed by a hot rolling with a starting temperature of 500°C or higher and an end-point temperature of 255 to 300°C, and then performing cold rolling, the aluminum alloy foil after the final cold rolling has a tensile strength of 180 MPa or higher, a 0.2% yield strength of 160 MPa or higher, and an electrical conductivity of 58% IACS or higher, the aluminum alloy foil has a tensile strength of 170 MPa or higher and a 0.2% yield strength of 150 MPa or higher even when the aluminum alloy foil after the final cold rolling is subjected to heat treatment at any of 120°C for 24 hours, 140°C for 3 hours, and 160°C for 15 minutes, the resin layer comprises a resin containing an acryl-based resin, a soluble nitrocellulose-based resin or a chitosan-based resin, and a conductive material; and a water contact angle of the resin layer surface measured by θ/2 method in a thermostatic chamber at 23°C is 30 degrees or more and 105 degrees or less when the resin is the acryl-based resin, 100 degrees of more and 110 degrees or less when the resin is the soluble nitrocellulose-based resin, and 20 degrees or more and 50 degrees or less when the resin is the chitosan-based resin. a conductive substrate, and a resin layer provided on one side or both sides of the conductive substrate; wherein: the conductive substrate is an aluminum alloy foil obtained by subjecting an aluminum alloy cast ingot comprising 0.03 to 1.0 mass% of Fe, 0.01 to 0.3 mass% of Si, 0.0001 to 0.2 mass% of Cu, with the rest consisting of Al and unavoidable impurities, wherein an amount of each of the unavoidable impurities is 0.02% or less, and a total amount thereof is 0.15% or less, to a homogenizing treatment at 550 to 620°C for 1 to 20 hours, followed by a hot rolling with a starting temperature of 500°C or higher and an end-point temperature of 255 to 300°C, and then performing cold rolling, the aluminum alloy foil after the final cold rolling has a tensile strength of 180 MPa or higher, a 0.2% yield strength of 160 MPa or higher, and an electrical conductivity of 58% IACS or higher, the aluminum alloy foil has a tensile strength of 170 MPa or higher and a 0.2% yield strength of 150 MPa or higher even when the aluminum alloy foil after the final cold rolling is subjected to heat treatment at any of 120°C for 24 hours, 140°C for 3 hours, and 160°C for 15 minutes, the resin layer comprises a resin containing an acryl-based resin, a soluble nitrocellulose-based resin or a chitosan-based resin, and a conductive material; and a water contact angle of the resin layer surface measured by θ/2 method in a thermostatic chamber at 23°C is 30 degrees or more and 105 degrees or less when the resin is the acryl-based resin, 100 degrees of more and 110 degrees or less when the resin is the soluble nitrocellulose-based resin, and 20 degrees or more and 50 degrees or less when the resin is the chitosan-based resin. the conductive substrate is an aluminum alloy foil obtained by subjecting an aluminum alloy cast ingot comprising 0.03 to 1.0 mass% of Fe, 0.01 to 0.3 mass% of Si, 0.0001 to 0.2 mass% of Cu, with the rest consisting of Al and unavoidable impurities, wherein an amount of each of the unavoidable impurities is 0.02% or less, and a total amount thereof is 0.15% or less, to a homogenizing treatment at 550 to 620°C for 1 to 20 hours, followed by a hot rolling with a starting temperature of 500°C or higher and an end-point temperature of 255 to 300°C, and then performing cold rolling, the aluminum alloy foil after the final cold rolling has a tensile strength of 180 MPa or higher, a 0.2% yield strength of 160 MPa or higher, and an electrical conductivity of 58% IACS or higher, the aluminum alloy foil has a tensile strength of 170 MPa or higher and a 0.2% yield strength of 150 MPa or higher even when the aluminum alloy foil after the final cold rolling is subjected to heat treatment at any of 120°C for 24 hours, 140°C for 3 hours, and 160°C for 15 minutes, the resin layer comprises a resin containing an acryl-based resin, a soluble nitrocellulose-based resin or a chitosan-based resin, and a conductive material; and a water contact angle of the resin layer surface measured by θ/2 method in a thermostatic chamber at 23°C is 30 degrees or more and 105 degrees or less when the resin is the acryl-based resin, 100 degrees of more and 110 degrees or less when the resin is the soluble nitrocellulose-based resin, and 20 degrees or more and 50 degrees or less when the resin is the chitosan-based resin.