Sheet conveying apparatus and image scanning apparatus

An image scanning apparatus comprising:

• a first drive source;
• a first driving unit configured to be driven by a driving force of the first drive source and including a first roller configured to convey a sheet;
• a second drive source;
• a second driving unit configured to be driven by a driving force of the second drive source and including a second roller configured to convey the sheet;
• a scanning unit configured to read an image on the sheet conveyed by the first roller and the second roller;
• an operating unit configured to rotate when manually operated;
• and
• a switching unit configured to switch a state of the image scanning apparatus between a first state in which the first driving unit and the second driving unit are not connected to each other and a second state in which the first driving unit and the second driving unit are connected to each other,
• wherein, in the second state, rotation of the operating unit s transmitted to the first driving unit to rotate the first roller, and rotation of the operating unit is transmitted to the second driving unit to rotate the second roller.