A dip molding composition comprising, at least: an elastomer that contains a (meth)acrylonitrile-derived structural unit, an unsaturated carboxylic acid-derived structural unit, and a butadiene-derived structural unit in a polymer main chain; an epoxy crosslinking agent; water; and a pH modifier, wherein the elastomer contains the (meth)acrylonitrile-derived structural unit in an amount of 20 to 40% by weight, the unsaturated carboxylic acid-derived structural unit in an amount of 1 to 10% by weight, and the butadiene-derived structural unit in an amount of 50 to 75% by weight, and the epoxy crosslinking agent comprises an epoxy crosslinking agent containing an epoxy compound having three or more epoxy groups in one molecule and has a dissolution rate in water of 10 to 70% as determined by the following measurement method: Method of measuring the dissolution rate in water: 25.0 g of the epoxy crosslinking agent is precisely weighed in a beaker, 225 g of water (25°C) is added thereto, and the resultant is vigorously stirred and mixed at room temperature (23°C ± 2°C) for 15 minutes, after which the resulting mixture is left to stand for 1 hour, and the volume (mL) of an oily matter precipitated on the bottom of the beaker is subsequently measured to calculate the dissolution rate in water using the following equation: Dissolution rate in water % = ( 25.0 − Volume of oily matter mL × Density of epoxy crosslinking agent g / mL / 25.0 × 100; and wherein the epoxy crosslinking agent is added to the dip molding composition in an amount of 0.1 parts by weight to 5.0 parts by weight with respect to 100 parts by weight of the elastomer contained in the dip molding composition. an elastomer that contains a (meth)acrylonitrile-derived structural unit, an unsaturated carboxylic acid-derived structural unit, and a butadiene-derived structural unit in a polymer main chain; an epoxy crosslinking agent; water; and a pH modifier, wherein the elastomer contains the (meth)acrylonitrile-derived structural unit in an amount of 20 to 40% by weight, the unsaturated carboxylic acid-derived structural unit in an amount of 1 to 10% by weight, and the butadiene-derived structural unit in an amount of 50 to 75% by weight, and the epoxy crosslinking agent comprises an epoxy crosslinking agent containing an epoxy compound having three or more epoxy groups in one molecule and has a dissolution rate in water of 10 to 70% as determined by the following measurement method: Method of measuring the dissolution rate in water: 25.0 g of the epoxy crosslinking agent is precisely weighed in a beaker, 225 g of water (25°C) is added thereto, and the resultant is vigorously stirred and mixed at room temperature (23°C ± 2°C) for 15 minutes, after which the resulting mixture is left to stand for 1 hour, and the volume (mL) of an oily matter precipitated on the bottom of the beaker is subsequently measured to calculate the dissolution rate in water using the following equation: Dissolution rate in water % = ( 25.0 − Volume of oily matter mL × Density of epoxy crosslinking agent g / mL / 25.0 × 100; and wherein the epoxy crosslinking agent is added to the dip molding composition in an amount of 0.1 parts by weight to 5.0 parts by weight with respect to 100 parts by weight of the elastomer contained in the dip molding composition.