Abstract: A supporting assembly configured to fix chassis of electronic device to fixing bracket. Supporting assembly includes plate body, cushion, fastener and spacer. Plate body includes mounting hole and wall surface forming mounting hole, and plate body is configured to be fixed to chassis of electronic device. Cushion is disposed through mounting hole and includes opening. Fastener is disposed through opening of cushion. A side of fastener is configured to be fixed to fixing bracket, and cushion is clamped between another side of fastener and fixing bracket so as to be compressed. Spacer is disposed in mounting hole and located between wall surface of plate body and cushion. Hardness of spacer is greater than hardness of cushion.