To use a support for various purposes indoor and outdoor by providing a support shaft fitted to a sucker with a support plate for supporting a wash-line pole or the like, and fixing a bearing plate for bearing load applied to the support plate.

The support 1 for a smooth plate is provided with two suckers 2 obtained by integrally forming a fitting piece 2b having a through hole 2b1 with moderate rigidity bored in a sucker main body 2a having suction. A support plate 3 provided with semi-circular locking grooves 3a for locking a wash- line pole between the suckers 2 and a bearing plate 4 extended downward from the end of the support plate 3 provided with a quadrangular contact part 4a a the lower part thereof are integrally formed like an L-shape, and a support shaft 5 is passed through the connecting hole bored in the end of the support plate 3 and the through hole. In the case of drying washings in the interior in rainy days, the support 1 for the smooth plate is fitted to both side ends of a window glass of an aluminum sash sliding door, the suckers 2 are pressed to abut on the contact part 4a, and the wash-line pole is laid on the locking grooves 3a of the support plate 3 and washings are put on the wash-like pole.