PNS Shamsheer or PNS Shamsher also sometimes PNS Shamshir, meaning "sword", may refer to the following ships of Pakistan Navy:

• PNS Shamsher (K392); ex HMS Nadder (K392), a River-class frigate, transferred first to the Royal Indian Navy in 1945, and on Partition, in 1947, to Pakistan
• PNS Shamsheer (1969), the former British Leander-class Type 12 frigate HMS Diomede (F16); acquired by the Pakistan Navy in July 1988
• PNS Shamsheer (F-252), is Zulfiquar-class frigate built by Hudong-Zhonghua Shipyard in China; commissioned by the Pakistan Navy in January 2010

• IRIS Shamshir (P227) of the Iranian Navy
• Shamshir (disambiguation)

This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.