An image forming apparatus comprising: a photoconductor ; and an electricity removing member electrically grounded and rotatably disposed to be in contact with a surface of the photoconductor , wherein with regard to a resistance component of an inner impedance (Z1) of the electricity removing member and a resistance component of a contact impedance (Z2) of the electricity removing member that are calculated from a Cole-Cole plot obtained from measurement in a frequency range of 0.05 Hz to 100 kHz by an AC impedance method, the resistance component of the inner impedance (Z1) is equal to or lower than a value that is obtained by multiplying a calculated resistance value by a first specific value, the calculated resistance value being calculated based on a predetermined formula as a DC resistance value of the electricity removing member that is required to reduce a pre-electricity-removal potential of the photoconductor to a predetermined post-electricity-removal potential during an electricity removal time that is obtained by dividing a contact width between the photoconductor and the electricity removing member by a linear speed of the photoconductor , the first specific value being calculated based on a ratio of a linear speed of the electricity removing member to the linear speed of the photoconductor , and the resistance component of the contact impedance (Z2) is equal to or lower than a value that is obtained by multiplying the calculated resistance value by a second specific value that is calculated based on the ratio of the linear speed of the electricity removing member to the linear speed of the photoconductor , wherein when C denotes a capacitance of the photoconductor , t denotes the electricity removal time, V0 denotes the pre-electricity-removal potential, V1 denotes the post-electricity-removal potential, and R21 denotes the calculated resistance value, the calculated resistance value R21 is calculated based on a following formula : V 1 = V 0 × e − t / R 21 ⋅ C a photoconductor ; and an electricity removing member electrically grounded and rotatably disposed to be in contact with a surface of the photoconductor , wherein with regard to a resistance component of an inner impedance (Z1) of the electricity removing member and a resistance component of a contact impedance (Z2) of the electricity removing member that are calculated from a Cole-Cole plot obtained from measurement in a frequency range of 0.05 Hz to 100 kHz by an AC impedance method, the resistance component of the inner impedance (Z1) is equal to or lower than a value that is obtained by multiplying a calculated resistance value by a first specific value, the calculated resistance value being calculated based on a predetermined formula as a DC resistance value of the electricity removing member that is required to reduce a pre-electricity-removal potential of the photoconductor to a predetermined post-electricity-removal potential during an electricity removal time that is obtained by dividing a contact width between the photoconductor and the electricity removing member by a linear speed of the photoconductor , the first specific value being calculated based on a ratio of a linear speed of the electricity removing member to the linear speed of the photoconductor , and the resistance component of the contact impedance (Z2) is equal to or lower than a value that is obtained by multiplying the calculated resistance value by a second specific value that is calculated based on the ratio of the linear speed of the electricity removing member to the linear speed of the photoconductor , wherein when C denotes a capacitance of the photoconductor , t denotes the electricity removal time, V0 denotes the pre-electricity-removal potential, V1 denotes the post-electricity-removal potential, and R21 denotes the calculated resistance value, the calculated resistance value R21 is calculated based on a following formula : <EOS>