The Port Island Line (ポートアイランド線, Pōtoairando-sen), commonly known as Port Liner (ポートライナー, Pōtorainā) is an urban automated guideway transit (AGT) system in Kobe, Japan, operated by Kobe New Transit.

As the map indicates, the present system consists of one straight line, originating at Sannomiya Station and terminating at Kobe Airport Station, and a loop attached to the middle of the straight line.

The main section between Sannomiya and the airport is entirely double track, but the remaining of the loop has not been rebuilt so that the three stations with PL prefix still serve only one way.

Originally, before the 2006 extension to the airport, the loop section was single track and operated only counter-clockwise trains.

In an announcement in 2018, a proposal was made to extend the Port Island Line to 8-car operation following an increase in ridership.