A pest control device of the present invention moves along a pipe rail positioned on the ceiling of the vinyl greenhouse and has spray units vertically provided at a horizontal bar positioned at both sides, so that the pest control device performs a spray operation toward lateral surfaces of crops while being positioned between furrows, thereby achieving a uniform and deep spray with respect to the crops, leasing to the improvement in the spraying efficiency. In the pest control device of the present invention, which moves along a pipe rail positioned on the ceiling of the vinyl greenhouse and has nozzles installed at a horizontal bar positioned at both sides, the spray units positioned between the furrows are provided at the horizontal bar, to perform a spray operation on both crops such that the spray operation is performed toward lateral surfaces of the crops planted in the ridge between the furrows. In addition, a roller part is provided at the upper end of a support frame so that the support frame moves
