An information processing apparatus includes a first casing and a second casing hinge-connected to the first casing via a hinge part. A sub display provided to the second casing is exposed to the outside when the first casing and the second casing are in a closed state, and displays a plurality of input numeral keys in a first display area when the first and second casings are in the closed state. A control unit accepts an input of any input numeral key from among the plurality of the input numeral keys displayed in the first display area and decides the input of the accepted input numeral key. While following pressing of an outgoing call key provided to the second casing, an outgoing call is performed to another information processing apparatus identified by a combination of the decided numerals based on the input numeral keys whose inputs have been decided.