PURPOSE: To drive a wiper blade with an optimum wiping interval agreeing with a feeling of a driver even at the time of a very small rainfall such as at the time of running in a tunnel with no running ahead.

CONSTITUTION: In a wiper control device which integrates an output from a rainwater drip sensor 21 to drive a wiper blade in the point of time any earlier of the point of time an integrated value of the output reaches a threshold value or more and of the point of time a predetermined intermittent time passes from after ending wiping action in the preceding time, in a condition that the device is operated in an INT mode by setting the intermittent time to a maximum value, after a wiper switch 2 is once selected to an off-mode, when the device is switched again to the INT mode within a predetermined time, the before-mentioned maximum value is corrected long. Thus, the intermittent time at the time of very small rainfall is corrected long, to reduce complicated on-off operation by an operator.