The present invention relates to a peptide derivative for regulating the thymic stromal lymphoid protein-mediated signaling and a pharmaceutical composition including the peptide derivative for preventing and treating allergy and asthma diseases and, more particularly, to a peptide derivative represented by Chemical Formula 1 and a pharmaceutical composition including the peptide derivative for preventing and treating allergy and asthma diseases. According to the present invention, provided are a peptide derivative capable of effectively inhibiting the formation of an inflammatory response of allergy and asthma diseases and a pharmaceutical composition including the peptide derivative. By using the present invention, various allergy and asthma diseases can be fundamentally prevented or treated.