An object is to provided a polyimide resin that is prevented from generation of volatiles due to decomposition or the like even at high temperatures equal to or higher than 250° C. and has good adhesiveness, and a resin composition and a laminated film using the same. Provided is a polyimide resin having at least a tetracarboxylic dianhydride residue and a di-amine residue and having a glass transition temperature of 30° C. or lower, wherein a residue of a polysiloxane di-amine represented by general formula (1) is contained as the di-amine residue, wherein n is a natural number and the average calculated from the average molecular weight of the polysiloxane di-amine is within the range of from 5 to 30; R1 and R2 may be the same or different and each represent an alkylene group having 1 to 30 carbon atoms or a phenylene group; R3 to R6 may be the same or different and each represent an alkylene group having 1 to 30 carbon atoms, a phenyl group, or a phenoxy group.