Image forming apparatus

An image forming apparatus includes: a photosensitive drum configured to rotate about a rotational axis extending in an axial direction; and a charger that charges the photosensitive drum. The charger includes: a wire electrode; a grid electrode having a grid surface that faces the photosensitive drum between the wire electrode and the photosensitive drum; and a pair of shield electrodes, which faces each other with interposing the wire electrode therebetween, and which extends in a substantially orthogonal direction to the grid electrode. The grid surface is inclined to a second plane such that the grid electrode and the shield electrode come close to the photosensitive drum at a more downstream side in a rotating direction of the photosensitive drum than a first plane, wherein the first plane includes the wire electrode and the rotational axis of the photosensitive drum, and the second plane is orthogonal to the first plane.