A network connection device includes: one or more network devices; a network switching control section configured to determine a second network as a candidate network to which connection is subsequently switched from a first network to which a network device is currently connecting; a network relation state determination section configured to determine whether or not the network device is used for forming a PAN; a disconnection-caused disadvantage determination section configured to determine whether or not a disadvantage to a user will be caused by switching connection to the second network, based on the result of the determination by the network relation state determination section; and a switching acceptability determination section configured to prohibit switching connection to the second network when the result of the determination is that a disadvantage to the user will be caused.