The present invention relates to a height-adjustable pot stand for a railing. The purpose of the present invention is to adjust the height a pot being installed on a railing of an apartment by installing a height-adjustable stand of a pot stand which supports at least one pot. An embodiment of the present invention includes: a rectangular-shaped support plate which has a drainage hole and supports pots a support frame which is formed in both front and back side corners of the support plate with a predetermined height for supporting the supporting plate against the railing protective plates which are installed in the front and both sides which are made by the support plate and the support frame with a predetermined height for preventing the fall of the pots a guide plate which is installed in the back side which is made by the support plate and the support frame with a predetermined height, and has a plurality of guide rails formed in the vertical direction with constant intervals, wherein pin grooves are formed to penetrate the guide rails an elevation stand which consists of a back plate in which rail grooves corresponding to the guide rails of the guide plate are formed in the vertical direction on the rear side, and a plurality of fixating pin grooves are formed to penetrate thereof corresponding to the pin grooves, and a pot stand which is horizontally and integrally formed in a lower end of the back plate for supporting the pots fixation pins which are inserted into the pin grooves of the guide plates and fixating pin grooves of the back plate by coinciding the height of the elevation stand, and fix the elevation stand and a fixation clip which is latched to a pipe of the railing and is engaged with each of upper back end units of the support frame using bolts and nuts, and fixes the support frame to the railing to support the support plate.COPYRIGHT KIPO 2014본 발명은 높낮이 조절식 난간용 화분 받침대에 관한 것으로, 아파트와 같은 공동주택의 베란다 난간에 설치되어 화분을 받치는 화분 받침대의 높낮이 조절 받침대를 하나 이상 설치하여 거치되