PROBLEM TO BE SOLVED: To provide a neovascularization inhibitor which acts effectively, and is relatively inexpensive and novel.SOLUTION: Provided is a neovascularization inhibitor, a main active constituent of which is at least either one of 5,8,11-eicosatrienoic acid (n-9) and 11,14,17-eicosatrienoic acid (n-3). The inhibitor is available as a liquid medicine, an emulsion, an ointment, a lotion agent or a fomentation. It may be used also as an eye drop, an eye injection, and a cosmetic.COPYRIGHT: (C)2012,JPO&INPIT【課題】効果的に作用し、比較的安価で新規な血管新生抑制剤を提供する。【解決手段】5,8,11-エイコサトリエン酸(n-9)、及び11、14,17-エイコサトリエン酸(n-3)のうちの、少なくとも一方を主たる有効成分とする血管新生抑制剤である。形態は、液剤、乳剤、軟膏剤、ローション剤、または湿布剤である。点眼剤、眼注剤、化粧料として用いても良い。【選択図】なし