To provide a mobile communication terminal that increases the probability that a user can output a recognizable message body as compared with the case that interpretation processing is not uniformly performed when a message having an illegal interpretation processing field in its header is received.

The mobile communication terminal (mobile phone) 10 is equipped with a header decision part 111 and a message interpretation processing part 112. The header decision part 111 decides whether the interpretation processing field included in the header of the message received through a mobile phone communication network 20 is illegal. The message interpretation processing part 112 interprets the message body of the received message by using one of a plurality of kinds of interpreting methods that the mobile communication terminal 10 can use when the header decision part 111 decides that the interpretation processing field is illegal.