Purpose To study choroidal vascular abnormal characteristics in choroidal vascular abnormal characteristics in choroiditis using indocyanine green angiography(ICGA). Methods Thirteen cases (16 eyes) of choroiditis were examined with fundus fluorescein angiography (FFA) and ICGA. Results ICGA findings in choroiditis were as follows:(1) dilatation of choroidal vessels with segmentary appearance and irregular margind;(2) hyperpermeability of choroidal vessels;(3) choroidal filling defects; (4) choroidal hypofluorescence with edema;(5) dilatation of vortex veins. (Chin J Ocul Fundus Dis,1998,14:92-84) Conclusion ICGA is useful in evaluating the lesions and circulation disturbance of choroiditis which cannot usually be demonstrable in FFA.