Hypertrophic cardiomyopathy (HCM) is not uncommon in clinical practices. Various electrocardiographic abnormalities have been noted in patients with HCM, such as anterolateral and inferior pseudo Q waves or apical giant inverted T wave. Patterns of ventricular preexcitation including the Wolff-Parkinson-White have been reported in patients with HCM, especially in certain congenital glycogen storage diseases. Here, we describe a male HCM patient whose twelve-lead electrocardiogram showed short PR interval and wide QRS suggesting ventricular preexcitation. However, after detailed electrophysiological study, pseudo ventricular preexcitation with normal atrioventricular nodal conduction was diagnosed.