A vehicle traveling control apparatus comprising: travel controlling means (30, 40) for controlling a driving force and a braking force of an own vehicle so as to keep the own vehicle traveling at a constant speed in accordance with a target speed without an accelerator pedal operation by a driver; speed limit acquisition means (20, 21, 22) for acquiring a speed limit of a road on which the own vehicle travels; an operating unit configured to be operated by the driver; and target speed setting means for setting the target speed to the speed limit when a long-push operation which is a push operation of the operating unit continued for a long-push completion time or more is detected in a situation in which the speed limit acquired by the speed limit acquisition means and the current target speed are different from each other, characterized in that the target speed setting means comprises speed limit selecting means configured so as to select, when the speed limit acquired by the speed limit acquisition means is switched from a first speed limit to a second speed limit in a period in which a push operation of the operating unit is being detected and a duration time of the push operation has not yet reached the long-push completion time, the second speed limit and to set the target speed to the second speed limit at a time point at which the duration time of the push operation has reached the long-push completion time, thereafter. travel controlling means (30, 40) for controlling a driving force and a braking force of an own vehicle so as to keep the own vehicle traveling at a constant speed in accordance with a target speed without an accelerator pedal operation by a driver; speed limit acquisition means (20, 21, 22) for acquiring a speed limit of a road on which the own vehicle travels; an operating unit configured to be operated by the driver; and target speed setting means for setting the target speed to the speed limit when a long-push operation which is a push operation of the operating unit continued for a long-push completion time or more is detected in a situation in which the speed limit acquired by the speed limit acquisition means and the current target speed are different from each other, characterized in that the target speed setting means comprises speed limit selecting means configured so as to select, when the speed limit acquired by the speed limit acquisition means is switched from a first speed limit to a second speed limit in a period in which a push operation of the operating unit is being detected and a duration time of the push operation has not yet reached the long-push completion time, the second speed limit and to set the target speed to the second speed limit at a time point at which the duration time of the push operation has reached the long-push completion time, thereafter. when the speed limit acquired by the speed limit acquisition means is switched from a first speed limit to a second speed limit in a period in which a push operation of the operating unit is being detected and a duration time of the push operation has not yet reached the long-push completion time, the second speed limit and to set the target speed to the second speed limit at a time point at which the duration time of the push operation has reached the long-push completion time, thereafter.