The present invention relates to an agent for removing house dust mite allergens and a composition comprising the same. The composition comprises, as an active ingredient, the agent which is composed of a natural plant essential oil or its steam distillate and can effectively remove allergens derived from house dust mites. Thus, the agent and the composition can be used for the prevention, alleviation, mitigation or treatment of various allergic diseases, which can be caused by allergens derived from house dust mites, in an environmentally friendly and efficient manner without causing particular side effects. In addition, the agent and the composition can significantly reduce the prevalence of diseases caused by house dust mites and the frequency of exposure of people to house dust mites.
