A driving supporter includes an environment obtainer and a support controller configured to control a supporting device to perform driving support such that an own vehicle travels along a target traveling line. The environment obtainer includes a relative-positional-relationship obtainer configured to obtain a relative positional relationship between the own vehicle and an object detected based on object information obtained by an object-information obtainer. The support controller includes an offset-target-traveling-line setter configured to set, when the relative positional relationship is a specific relationship in which it is estimated that a steering operation in a direction in which the own vehicle avoids the object is to be performed, the target traveling line to an offset position that is shifted in a direction identical to a direction of a steering operation from the target traveling line located when the relative positional relationship is not the specific relationship.