The present invention relates to an ear-cleansing agent for companion animals and a method of manufacturing the same. More particularly, the present invention relates to an ear-cleansing agent for companion animals, which includes distilled Chamaecyparis obtusa water extracted from Chamaecyparis obtusa trees so as to enable antibacterial action, deodorization, and exfoliation and which does not include a surfactant so that the skin is not irritated even when the ear-cleansing agent is not washed away using water, and a method of manufacturing the same.