A dip molding composition, comprising at least: a carboxyl group-containing nitrile rubber elastomer; an epoxy crosslinking agent comprising an epoxy compound that contains three or more glycidyl ether groups in one molecule and has a basic skeleton containing an alicyclic, aliphatic or aromatic hydrocarbon; and a pH modifier, wherein the elastomer comprises 50% by weight or more, 78% by weight or less of a conjugated diene monomer-derived structural unit, 20% by weight or more, 30% by weight or less of an ethylenically unsaturated nitrile monomer-derived structural unit, and 3.5% by weight or more, 6% by weight or less of an ethylenically unsaturated carboxylic acid monomer-derived structural unit, the elastomer has an MEK-insoluble content of 60% by weight or more, 80% by weight or less in accordance with the measuring method as explained in the description, and the epoxy crosslinking agent has an MIBK/water distribution ratio of 50% or higher as determined by the following measurement method: Method of measuring the MIBK/water distribution ratio: in a test tube, 5.0 g of water, 5.0 g of methyl isobutyl ketone (MIBK) and 0.5 g of the epoxy crosslinking agent are precisely weighed and mixed with stirring at 23°C ± 2°C for 3 minutes, and the resulting mixture is centrifuged at 1.0 × 10 3 G for 10 minutes and thereby separated into an aqueous layer and an MIBK layer, after which the MIBK layer is fractionated and weighed to calculate the MIBK/water distribution ratio using the following equation: MIBK/water distribution ratio (%) = (Weight of separated MIBK layer (g) - Weight of MIBK before separation (g))/Weight of added crosslinking agent (g) × 100 this measurement is performed three times, and an average value thereof is defined as the MIBK/water distribution ratio. a carboxyl group-containing nitrile rubber elastomer; an epoxy crosslinking agent comprising an epoxy compound that contains three or more glycidyl ether groups in one molecule and has a basic skeleton containing an alicyclic, aliphatic or aromatic hydrocarbon; and a pH modifier, wherein the elastomer comprises 50% by weight or more, 78% by weight or less of a conjugated diene monomer-derived structural unit, 20% by weight or more, 30% by weight or less of an ethylenically unsaturated nitrile monomer-derived structural unit, and 3.5% by weight or more, 6% by weight or less of an ethylenically unsaturated carboxylic acid monomer-derived structural unit, the elastomer has an MEK-insoluble content of 60% by weight or more, 80% by weight or less in accordance with the measuring method as explained in the description, and the epoxy crosslinking agent has an MIBK/water distribution ratio of 50% or higher as determined by the following measurement method: Method of measuring the MIBK/water distribution ratio: in a test tube, 5.0 g of water, 5.0 g of methyl isobutyl ketone (MIBK) and 0.5 g of the epoxy crosslinking agent are precisely weighed and mixed with stirring at 23°C ± 2°C for 3 minutes, and the resulting mixture is centrifuged at 1.0 × 10 3 G for 10 minutes and thereby separated into an aqueous layer and an MIBK layer, after which the MIBK layer is fractionated and weighed to calculate the MIBK/water distribution ratio using the following equation: MIBK/water distribution ratio (%) = (Weight of separated MIBK layer (g) - Weight of MIBK before separation (g))/Weight of added crosslinking agent (g) × 100 this measurement is performed three times, and an average value thereof is defined as the MIBK/water distribution ratio.