The present invention relates to an injectable composition for labeling a lesion and a method for providing information on the position of the lesion using the injectable composition. More specifically, the injectable composition for labeling a lesion according to the present invention can include a second composition comprising a biocompatible viscous material in a first composition comprising a complex containing an active ingredient to resolve a problem of rapid settling of the complex. Additionally, in particular, the injection composition for labeling a lesion according to the present invention can have an effect of allowing a predetermined amount of the complex to be injected by resolving the problem of rapid settling of the complex during preparation of the injection, allowing a certain amount of the complex to be injected, and an effect of enabling convenient and stable use thereof for clinical purposes by resolving the problems of injecting an excessive amount of the complex and the quick spread thereof to the periphery.
