Abstract: An extensible windshield portable phone holder includes an extensible holder arrangement, which includes a supporter, a sucking device for firmly attaching to a predetermined position of a windshield and an extending device, and a phone holder mounted on the supporter and adapted to hold a portable phone thereon. The extending device includes an elongated rack connected to the phone holder, a supporting arm connecting to the sucking device and including an axial guiding tubular rail for slidably receiving the elongated rack, a locking switch mounted on the supporting arm for interlocking the elongated rack with the supporting arm to determine a transition position between the elongated rack and the supporting arm, so as to adjust the distance between the supporter and the sucking device. Furthermore, the locking switch can firmly lock the phone holder in position and can withstand the weight of the portable phone sat on the holder.