PROBLEM TO BE SOLVED: To provide a weed-preventing net mounting base 10 capable of easily attaching the weed-preventing net 5 to a desired height position regardless of the type and height of an existing protective fence F. SOLUTION: A vertical member 2 fixed to a pillar P of a protective fence F installed on a road R by a first fixing means 1, and a vertical member 2 fixed to a vertical member 2 by a second fixing means 3, and an upper end of a weed-preventing net 5. A cross member 4 for attaching the first fixing means 1 to the pillar P, and a carry-out portion 12 carried out from the pillar fixing part 11 to the outside of the road R. And a vertical member fixing portion 13 which is provided at the carry-out end portion of the carry-out portion 12 and which fixes the vertical member 2 so that the vertical member can be adjusted in the vertical position. The second fixing means 3 adjusts the vertical position of the vertical member 2. The road side fixing part 31 is fixed to the road side fixing part 31 and the road outside fixing part 32 provided on the road side fixing part 31 for fixing the horizontal member 4 outside the road R. [Selection diagram] Fig. 7【課題】既設の防護柵Ｆの種類や高さに関わらず、防草ネット５を所望の高さ位置に簡単に取り付けることができる防草ネット取付架台１０を提供すること。【解決手段】道路Ｒに設置された防護柵Ｆの支柱Ｐに第一固定手段１により固定される縦材２と、縦材２に第二固定手段３により固定され、防草ネット５の上端を取り付けるための横架材４と、を備え、第一固定手段１を、支柱Ｐに固定される支柱固定部１１と、支柱固定部１１から道路Ｒの外方へ持ち出された持出部１２と、持出部１２の持出端部に設けられ、縦材２を上下位置調節可能に固定する縦材固定部１３とから構成し、第二固定手段３を、縦材２に上下位置調節可能に固定される道路側固定部３１と、道路側固定部３１に設けられ、横架材４を道路Ｒの外方で固定する道路外側固定部３２とから構成した。【選択図】図７
