A method for producing a polyimide seamless belt, comprising a step of: heating an aqueous polyimide precursor solution composition, in which a polyamic acid, which is formed by the reaction of a tetracarboxylic acid component and a diamine component, and consists of a repeating unit represented by the following formula, is dissolved in an aqueous solvent together with an imidazole in an amount of 1.6 mole or more per mole of the tetracarboxylic acid component of the polyamic acid. wherein A represents at least one selected from the group consisting of a tetravalent group of an aromatic tetracarboxylic acid containing no fluorine group, from which carboxyl groups have been removed, a tetravalent group of an aliphatic tetracarboxylic acid, from which carboxyl groups have been removed, and a tetravalent group of an aromatic tetracarboxylic acid containing a fluorine group, from which carboxyl groups have been removed, and B represents at least one selected from the group consisting of a divalent group of an aromatic diamine containing no fluorine group and having a solubility in water at 25°C of 0.1 g/L or more, from which amino groups have been removed, a divalent group of an aliphatic diamine having a molecular weight of 500 or less, from which amino groups have been removed, and a divalent group of an aromatic diamine containing a fluorine group, from which amino groups have been removed, with the proviso that more than 50 mol% of A is a tetravalent group of an aromatic tetracarboxylic acid containing no fluorine group, from which carboxyl groups have been removed, and less than 50 mol%, including 0 mol%, of A is a tetravalent group of an aliphatic tetracarboxylic acid, from which carboxyl groups have been removed, and/or a tetravalent group of an aromatic tetracarboxylic acid containing a fluorine group, from which carboxyl groups have been removed, and more than 50 mol% of B is a divalent group of an aromatic diamine containing no fluorine group and having a solubility in water at 25°C of 0.1 g/L or more, from which amino groups have been removed, and less than 50 mol%, including 0 mol%, of B is a divalent group of an aliphatic diamine having a molecular weight of 500 or less, from which amino groups have been removed, and/or a divalent group of an aromatic diamine containing a fluorine group, from which amino groups have been removed, and a combination of only a tetravalent group of an aromatic tetracarboxylic acid containing no fluorine group, from which carboxyl groups have been removed, and only a divalent group of an aromatic diamine containing no fluorine group, from which amino groups have been removed, is excluded. heating an aqueous polyimide precursor solution composition, in which a polyamic acid, which is formed by the reaction of a tetracarboxylic acid component and a diamine component, and consists of a repeating unit represented by the following formula, is dissolved in an aqueous solvent together with an imidazole in an amount of 1.6 mole or more per mole of the tetracarboxylic acid component of the polyamic acid. wherein A represents at least one selected from the group consisting of a tetravalent group of an aromatic tetracarboxylic acid containing no fluorine group, from which carboxyl groups have been removed, a tetravalent group of an aliphatic tetracarboxylic acid, from which carboxyl groups have been removed, and a tetravalent group of an aromatic tetracarboxylic acid containing a fluorine group, from which carboxyl groups have been removed, and B represents at least one selected from the group consisting of a divalent group of an aromatic diamine containing no fluorine group and having a solubility in water at 25°C of 0.1 g/L or more, from which amino groups have been removed, a divalent group of an aliphatic diamine having a molecular weight of 500 or less, from which amino groups have been removed, and a divalent group of an aromatic diamine containing a fluorine group, from which amino groups have been removed, with the proviso that more than 50 mol% of A is a tetravalent group of an aromatic tetracarboxylic acid containing no fluorine group, from which carboxyl groups have been removed, and less than 50 mol%, including 0 mol%, of A is a tetravalent group of an aliphatic tetracarboxylic acid, from which carboxyl groups have been removed, and/or a tetravalent group of an aromatic tetracarboxylic acid containing a fluorine group, from which carboxyl groups have been removed, and more than 50 mol% of B is a divalent group of an aromatic diamine containing no fluorine group and having a solubility in water at 25°C of 0.1 g/L or more, from which amino groups have been removed, and less than 50 mol%, including 0 mol%, of B is a divalent group of an aliphatic diamine having a molecular weight of 500 or less, from which amino groups have been removed, and/or a divalent group of an aromatic diamine containing a fluorine group, from which amino groups have been removed, and a combination of only a tetravalent group of an aromatic tetracarboxylic acid containing no fluorine group, from which carboxyl groups have been removed, and only a divalent group of an aromatic diamine containing no fluorine group, from which amino groups have been removed, is excluded.