A frame of an image forming apparatus, comprising: a first frame configured to support: a sheet cassette (11a to 11c) configured to house a sheet; and a first conveying roller configured to convey the sheet extracted from the sheet cassette (11a to 11c); a second frame disposed above the first frame in a vertical direction, the second frame being coupled to the first frame, the second frame being configured to support: a second conveying roller configured to receive the sheet conveyed by the first conveying roller and convey the sheet; and an image forming unit configured to form an image on the sheet conveyed by the second conveying roller; and a first strut configured to be part of the first frame, the first strut including: a first base portion (74a1); a first plate portion (74a2) extending substantially perpendicularly from the first base portion; and a second plate portion (74a3) extending substantially perpendicularly from the first base portion (74a1), the second plate portion (74a3) being opposed to the first plate portion (74a2); a second strut configured to be part of the second frame, the second strut including: a second base portion (54a1) disposed above the first base portion (74a1) in the vertical direction, the second base portion (54a1) being in contact with the first base portion (74a1); a third plate portion (54a2) extending substantially perpendicularly from the second base portion (54a1), the third plate portion (54a2) being disposed above the first plate portion (74a2) in the vertical direction; and a fourth plate portion (54a3) extending substantially perpendicularly from the second base portion (54a1), the fourth plate portion (54a3) being opposed to the third plate portion (54a2), the fourth plate portion (54a3) being disposed above the second plate portion (74a3) in the vertical direction, a coupling member coupling the first strut and the second strut, the coupling member including: a third base portion (74b1) opposed to and spaced apart from the first base portion (74a1) and the second base portion (54a1); a fifth plate portion (74b2) extending substantially perpendicularly from the third base portion (74b1), the fifth plate portion (74b2) being coupled to the first plate portion (74a2) and the third plate portion (54a2); and a sixth plate portion (74b3) extending substantially perpendicularly from the third base portion (74b1), the sixth plate portion (74b3) being opposed to the fifth plate portion (74b2), the sixth plate portion (74b3) being coupled to the second plate portion (74a3) and the fourth plate portion (54a3). a first frame configured to support: a sheet cassette (11a to 11c) configured to house a sheet; and a first conveying roller configured to convey the sheet extracted from the sheet cassette (11a to 11c); a second frame disposed above the first frame in a vertical direction, the second frame being coupled to the first frame, the second frame being configured to support: a second conveying roller configured to receive the sheet conveyed by the first conveying roller and convey the sheet; and an image forming unit configured to form an image on the sheet conveyed by the second conveying roller; and a first strut configured to be part of the first frame, the first strut including: a first base portion (74a1); a first plate portion (74a2) extending substantially perpendicularly from the first base portion; and a second plate portion (74a3) extending substantially perpendicularly from the first base portion (74a1), the second plate portion (74a3) being opposed to the first plate portion (74a2); a second strut configured to be part of the second frame, the second strut including: a second base portion (54a1) disposed above the first base portion (74a1) in the vertical direction, the second base portion (54a1) being in contact with the first base portion (74a1); a third plate portion (54a2) extending substantially perpendicularly from the second base portion (54a1), the third plate portion (54a2) being disposed above the first plate portion (74a2) in the vertical direction; and a fourth plate portion (54a3) extending substantially perpendicularly from the second base portion (54a1), the fourth plate portion (54a3) being opposed to the third plate portion (54a2), the fourth plate portion (54a3) being disposed above the second plate portion (74a3) in the vertical direction, a coupling member coupling the first strut and the second strut, the coupling member including: a third base portion (74b1) opposed to and spaced apart from the first base portion (74a1) and the second base portion (54a1); a fifth plate portion (74b2) extending substantially perpendicularly from the third base portion (74b1), the fifth plate portion (74b2) being coupled to the first plate portion (74a2) and the third plate portion (54a2); and a sixth plate portion (74b3) extending substantially perpendicularly from the third base portion (74b1), the sixth plate portion (74b3) being opposed to the fifth plate portion (74b2), the sixth plate portion (74b3) being coupled to the second plate portion (74a3) and the fourth plate portion (54a3).