An image reading apparatus to read an image formed on a document sheet, comprising: a lower unit; an upper unit arranged on top of the lower unit and rotatably attached to the lower unit via a hinge (77L, 77R) to rotate about a rear end of the upper unit with respect to the lower unit; and at least one image reader (11, 12) configured to read the image formed on the document sheet, wherein the upper unit includes a sheet conveyer (31-39, 54, 54A), which conveys the document sheet in a sheet-feeding path, an upper image reader, which is one of the at least one image reader (11, 12) to read the image formed on the document sheet being conveyed, and an external covering to accommodate the sheet conveyer (31-39, 54, 54A) and the upper image reader; wherein the lower unit includes a controller to control image-processing of the image read by the at least one image reader (11, 12); wherein the sheet conveyer (31-39, 54, 54A) includes rollers, a driving source to drive the rollers, and a frame to support the rollers and the driving source; characterized in that the at least one image reader (11, 12) and the controller are connected with each other via a flat cable; the flat cable connecting the upper image reader with the controller has a rearward-extending section and a widthwise-extending section; the rearward-extending section extends rearward from the upper image reader along a front-rear direction and is drawn in an area below a part of the frame and to a rear section of the upper unit to reach an inner surface of the external covering at the rear end of the upper unit; and the widthwise-extending section extends from the rearward-extending section at the rear end of the upper unit along the inner surface of the external covering in a direction orthogonal to the front-rear direction along the rear end of the upper unit to reach an outlet of the upper unit and is directed to the lower unit via the outlet. a lower unit; an upper unit arranged on top of the lower unit and rotatably attached to the lower unit via a hinge (77L, 77R) to rotate about a rear end of the upper unit with respect to the lower unit; and at least one image reader (11, 12) configured to read the image formed on the document sheet, wherein the upper unit includes a sheet conveyer (31-39, 54, 54A), which conveys the document sheet in a sheet-feeding path, an upper image reader, which is one of the at least one image reader (11, 12) to read the image formed on the document sheet being conveyed, and an external covering to accommodate the sheet conveyer (31-39, 54, 54A) and the upper image reader; wherein the lower unit includes a controller to control image-processing of the image read by the at least one image reader (11, 12); wherein the sheet conveyer (31-39, 54, 54A) includes rollers, a driving source to drive the rollers, and a frame to support the rollers and the driving source; characterized in that the at least one image reader (11, 12) and the controller are connected with each other via a flat cable; the flat cable connecting the upper image reader with the controller has a rearward-extending section and a widthwise-extending section; the rearward-extending section extends rearward from the upper image reader along a front-rear direction and is drawn in an area below a part of the frame and to a rear section of the upper unit to reach an inner surface of the external covering at the rear end of the upper unit; and the widthwise-extending section extends from the rearward-extending section at the rear end of the upper unit along the inner surface of the external covering in a direction orthogonal to the front-rear direction along the rear end of the upper unit to reach an outlet of the upper unit and is directed to the lower unit via the outlet.