A portable information processing apparatus, includes: a body section configured to have an upper face on which a keyboard for inputting information is provided at least; and a display section configured to have an upper face on which a display member for displaying information is provided at least; the display section being mounted for sliding movement between a first position at which the display section is placed in an overlapping relationship at an upper portion of the body section and a second position at which the display section opens the upper portion of the body section, the display section being mounted for tilting up and down movements with respect to the body section when the display section is at the second position.