Portable information terminal equipment having a function to perform the informing process at the time of reception in cooperation with a connecting section driving mechanism as well as a function to enable the open/close movement of the upper and lower units through one-touch operation making use of the connecting section driving mechanism. Depending on informing modes, a motor drive circuit drives a motor under the control of a controller on receipt of a call or a message to apply a driving force to the open/close mechanism of a hinge unit. Thereby, the portable information terminal equipment is folded/unfolded, that is, the posture of the portable information terminal equipment is changed, and a user is informed of the receipt of the call or the message. Besides, the portable information terminal equipment performs conventional informing processes, such as ringing, light emitting, message or image display and the like, in combination with the open/close or rotative operation.