Disclosed is a halogen- and phosphorus-free flame-retardant adhesive resin composition which can be used in heat contact bonding of adherends at or below 250° C. and is excellent in heat resistance, solder heat resistance after moisture absorption, and processability. Also disclosed is an adhesive film produced from said composition. The flame-retardant adhesive resin composition comprises 65-98% by weight of a silicone unit-containing polyimide resin and 2-35% by weight of an epoxy resin having an acenaphthylene-substituted naphthalene skeleton. The adhesive film produced from the flame-retardant adhesive resin composition is suitable as an adhesive for a laminate for a multiplayer printed circuit board substrate, an adhesive for a hybrid circuit board substrate, and an adhesive for a coverlay film.