The present invention relates to a multimedia apparatus in which a user is enabled to use the portable computer more readily by mounting or dismounting various kinds of multimedia apparatus. The portable computer is designed so as to enable the user to use the portable computer detached from or mounted on a stand. The portable computer has a first connection part in a lower part thereof and a stand having a second connection part to which the first connection part of the portable computer is mounted or dismounted. Further features include the ability to mount or dismount an electrophotographic pen, a printer connector with cover, a rotatable battery, a light receiving part, and an auxiliary peripheral device.