A minidrive pen with laser and illuminating function includes an upper and a lower pen barrel and an adapter, wherein a minidrive circuit board is configured within the upper pen barrel, and which is connected to a USB (Universal Serial Bus) connector. Two orifices are defined in a bottom extremity of the lower pen barrel. Furthermore, a laser element, an illuminating element and a battery compartment are configured within the lower pen barrel. Switches are configured in a surface of the lower pen barrel. After disposing batteries in the battery compartment, the upper pen barrel and the lower pen barrel are joined together by means of the adapter. Furthermore, electric conduction is also effectuated by means of the adapter, thereby constituting a easy carrying of the minidrive, and simultaneously achieving effectiveness of a laser pointer and illumination.