Purpose: Drug delivery performances of the Swinghaler(R) were evaluated and compared to other commercial inhalers.Methods:Airflow resistances, delivered doses and fine particle dose (FPD) of inhaled drugs through various inhalers were measured using airflow meter, drug collection apparatus and Multi Stage Liquid Impinger at various airflow rates.Results: Swinghaler showed medium airflow resistance, constant delivered dose and high fine particle dose.Conclusion: Swinghaler(R) using swing back system and antistatic material is a novel multi-dose dry powder inhaler with excellent performances of drug delivery to the lungs.