The present invention relates to an injectable composition for labeling a lesion and a method for providing the 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 the 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 certain amount of a complex to be injected by resolving the problem of the rapid settling of the complex during injection preparations, allowing a certain amount of the complex to be injected, and an effect capable of a 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.
