A belt-type fixing device is provided that achieves reduction in time required between start of rotation of a fixing belt upon reception of print starting signal in printing-standby status and recovery of a specified fixation temperature in a fixing nip.The belt-type fixing device of the invention has an endless-sheet-like fixing belt to be heated, a nip forming member positioned inside the fixing belt, a rotatable pressurizing roller which is in pressure contact with the nip forming member with the fixing belt interposed between and in which part in contact with the fixing belt forms a fixing nip, and a heater lamp for heating the fixing belt which lamp is provided in a position inside the fixing belt and away from the fixing nip, and the fixing nip is in a position higher than the heater lamp.