An engine starting system using biological information

The present invention relates to a highly convenient starting of an engine of an automobile using an individual authentication device, which utilizes biological information and provides a security function required when starting the engine, while protecting a sensor for receiving the biological information. To realize this, the present invention provides an engine starting system which comprises: an ignition switch (3) for controlling a state of an automobile; a key (60) for changing a state of the ignition switch (3); a registration key for registering biological information; a switch (4) for starting an engine; a sensor for inputting biological information; a device for storing biological information; a collating unit for collating the inputted biological information with the stored biological information; and a lid (311) for covering the sensor of an authentication device.