Patent ID: 7693457

Claim:
A charging member which comprises a surface layer containing a polysiloxane having a first unit represented by SiO 0.5 R 1 (OR 2 )(OR 3 ), a second unit represented by SiO 1.0 R 4 (OR 5 ) and a third unit represented by SiO 1.5 R 6 , where R 1 , R 4 and R 6 each independently represent a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, and R 2 , R 3 and R 5 each independently represent a hydrogen atom or a substituted or unsubstituted alkyl group; said surface layer satisfying: 0.60≦{( x+y )/( x+y+z )}≦0.80 where the number of moles of the first unit, the number of moles of the second unit and the number of moles of the third unit in the polysiloxane are represented by x (mol), y (mol) and z (mol), respectively.