A multifunction apparatus is provided with a printer unit having a discharge tray disposed on a top face thereof and a scanner unit disposed on the image recording unit with a space being defined between the image reading unit and the discharge tray. The scanner unit has a casing. The casing is provided in the printer unit rotatably about a rear side of the apparatus in such a fashion as to open a front side of the apparatus. The casing has a recessed part formed at a position of a bottom plate thereof and corresponding to the discharge tray. Thus, a recording sheet removal opening opened on a front side of the apparatus is formed. A reinforcing portion recessed in such a fashion as to be swollen toward an internal space of the casing is formed on the bottom plate having the recessed part.