This is multi-center, randomized, double-blind, parallel, placebo-controlled phase III clinical trial to evaluate the efficacy and safety of FURESTEM-AD Inj. for moderate to severe chronic atopic dermatitis

Inclusion Criteria:

1. Of either gender, aged >=19
2. Atopic Dermatitis subjects who are coincident with Hanifin and Rajka diagnosis criteria
3. Chronic Atopic Dermatitis that has been present for at least 3 years
4. EASI>=12 at screening and baseline visit
5. IGA>=3, SCORAD index>=25, BSA >=10% of AD involvement at screegning and baseline visit
6. Subjects with documented record of inadequate response to the stable use of topical atopic dermatitis treatment within 24 weeks before participating in the study, or whom are inadvisable due to safety risks
7. Subjects who understand and voluntarily sign an informed consent form

Exclusion Criteria:

1. Subjects with medical history or surgery/procedure history
2. Subjects with diseases at the time of participation in this study (systemic infection, other serious skin disorders, pigmentation or extensive scarring in atopic dermatitis symptom region)
3. Subjects who need prohibited medication during clinical period
4. Pregnant, breast-feeding women or women who plan to become pregnant during this study
5. Subjects who currently participate in other clinical trial or participated in other clinical trial within 4 weeks
6. Any other condition which the investigator judges would make patient unsuitable for study participation