Disclosed is a slide type mobile communication terminal. The terminal comprises an upper main body having a display section and a first function key pad section; a lower main body connected to the upper main body to be slidable upward and downward relative to the upper main body and having an input key pad section and a second function key pad section on lower and upper parts of the lower main body; and a slide engagement member having a slide rail provided to one of the upper and lower main bodies and extending over about a whole length of an upstream and downstream direction of the main body and a slide protrusion located at a middle point of an upstream and downstream direction of the other main body and inserted into the slide rail, and connecting the upper and lower main bodies to be slidable.