The present invention provides a mobile electrocardiograph (ECG) apparatus in which: there is no need to provide a monitor or other display unit to an ECG unit, allowing the apparatus to be commensurately reduced in size and weight; the cost of operation is reduced through the use of a handheld electrode unit; and a body-surface-adhering electrode can be used in only cases when low-noise tests are required, thus promoting ease of handling. Provided is a mobile ECG apparatus for acquiring an electrocardiographic signal upon electrodes being brought into contact with a body surface, wherein the mobile ECG apparatus is characterized by comprising an ECG unit (1) and an electrode unit that includes a plurality of induction electrodes, the ECG unit (1) being configured so as to acquire an electrocardiographic signal from the body surface potential via the electrode unit, and also being configured so as to be capable of wirelessly transmitting the electrocardiographic signal to an analyzer; the ECG unit (1) and the electrode unit furthermore being provided so as to be capable of being attached to and detached from each other by a plurality of connection parts; and the plurality of connection parts being provided with induction-electrode contact points for respectively connecting to the plurality of induction electrodes.