A roller unit for a fixing device of an electrophotographic image forming apparatus, the roller unit comprising: a rotatably supported first roller; a second roller having a rotary shaft extending in parallel with the first roller; and a roller support mechanism supporting the rotary shaft, wherein a support frame made of sheet metal and having a support groove extending in a direction away from the first roller, the support groove receiving the rotary shaft; a cover member made of sheet metal, formed in advance such that a pair of regions each of which is inclined outward by an angle θ so that the distance between the regions is larger than the width of the support groove, and is attached to the support groove so that the regions cover a pair of side edge sections facing each other across the support groove in the width direction thereby producing an elastic force acting on the side edge sections to press the side edge sections outward; a bearing member made of resin and having a bearing groove rotatably supporting the rotary shaft, the bearing member being disposed in the support groove, with the cover member interposed therebetween, so as to be movable in a direction toward/away from a bottom of the support groove; an urging member that urges the bearing member in a direction away from the bottom of the support groove; and the support frame has a projection provided at the bottom of the support groove, the cover member has a second region that covers the bottom of the support groove and an opening section that is formed in the second region and capable of receiving the projection inserted therethrough, and the urging member is disposed between the bearing member and the projection protruding from the opening section in the state where the cover member is attached to the support groove. a rotatably supported first roller; a second roller having a rotary shaft extending in parallel with the first roller; and a roller support mechanism supporting the rotary shaft, wherein a support frame made of sheet metal and having a support groove extending in a direction away from the first roller, the support groove receiving the rotary shaft; a cover member made of sheet metal, formed in advance such that a pair of regions each of which is inclined outward by an angle θ so that the distance between the regions is larger than the width of the support groove, and is attached to the support groove so that the regions cover a pair of side edge sections facing each other across the support groove in the width direction thereby producing an elastic force acting on the side edge sections to press the side edge sections outward; a bearing member made of resin and having a bearing groove rotatably supporting the rotary shaft, the bearing member being disposed in the support groove, with the cover member interposed therebetween, so as to be movable in a direction toward/away from a bottom of the support groove; an urging member that urges the bearing member in a direction away from the bottom of the support groove; and the support frame has a projection provided at the bottom of the support groove, the cover member has a second region that covers the bottom of the support groove and an opening section that is formed in the second region and capable of receiving the projection inserted therethrough, and the urging member is disposed between the bearing member and the projection protruding from the opening section in the state where the cover member is attached to the support groove.