Abstract: A redialing apparatus for a portable telephone includes a channel disconnection detection section, an on-hook processing section, a call determination section, and a redial processing section. The channel disconnection detection section monitors a communication state during communication to detect a channel disconnection. When the channel disconnection detection section detects a channel disconnection, the on-hook processing section executes on-hook processing. When the channel disconnection detection section detects the channel disconnection, the call determination section determines whether a call during communication is an outgoing call or an incoming call. When the call determination section determines that the call is an outgoing call, the redial processing section executes redial processing on the basis of calling information used for calling processing of the call during communication.