Scanner

A manual scanner comprising:

• a close contact type image sensor having first reading elements arranged along a main scanning direction and second reading elements arranged outside a scanning area along the main scanning direction, wherein the first reading elements read an original copy and the second reading elements read a predetermined distinguishing pattern independently of the first reading elements;
• a cylindrical rotating body rotatable in a subscanning direction and having an internal face that faces the second reading elements, the internal face having the predetermined distinguishing pattern, wherein the second reading elements read the distinguishing pattern to detect a rotation speed of the cylindrical rotating body;
• a platen roller arranged on an opposite side of the cylindrical rotating body and connected to the cylindrical rotating body with a shaft so that the platen roller and the cylindrical rotating body roll together at the same speed, the second reading elements positioned between the platen roller and the cylindrical rotating body;
• and
• detecting means for detecting the rotating speed of the cylindrical rotating body on the basis of detection output signals of the second reading elements,
• wherein the detecting means reads the second reading elements for a shorter period than the first reading elements.