Dengue fever is one of the most important emerging viral diseases globally. Cardiovascular manifestations are more common in Dengue Shock Syndrome (DSS) and Dengue Hemorrhagic Fever (DHF) than in classical Dengue fever. Here we present a case of classical Dengue fever with transient reversible cardiac conduction disturbance in the form of 2nd degree Mobitz type 1 heart block (Wenckebach phenomenon) which is extremely rare. This case also highlights the importance of monitoring the pulse of the patient which can detect early abnormalities in cardiac rhythm.