'''Perjanjian Kemitraan Ekonomi Strategis TransAntar-Pasifik''' ('''TPSEP''' atau '''P4''') adalah [[perjanjian dagang]]<ref>{{Cite news|last = Weisbrot|first = Mark|authorlink = Mark Weisbrot|date = 19 November 2013|title = The Trans-Pacific Partnership treaty is the complete opposite of 'free trade' |url = http://www.theguardian.com/commentisfree/2013/nov/19/trans-pacific-partnership-corporate-usurp-congress|accessdate = 19 November 2013|publisher = [[The Guardian|theguardian.com]] }}</ref> antara [[Brunei]], [[Chili]], [[Selandia Baru]], dan [[Singapura]]. Tujuannya adalah mendorong liberalisasi negara-negara di kawasan Asia-Pasifik.<ref name="TPP2005">{{cite web|url=http://www.mfat.govt.nz/downloads/trade-agreement/transpacific/main-agreement.pdf|title=Trans-Pacific Strategic Economic Partnership Agreement|format=PDF|year=2005|accessdate=28 January 2012}}</ref>
Sejak 2010, negosiasi dilakukan<ref>{{cite web |accessdate=2012-12-15 |quote= Formal negotiations started in March 2010, and there has been 10 rounds of negotiations as of January 2012. |publisher=Singapore Government |url=http://www.fta.gov.sg/fta_ongoingneg_tpp.asp?hl=16 |title=On-going Negotiations at a Glance: TPP (Trans-Pacific Partnership)}}</ref> untuk merumuskan '''Kemitraan TransAntar-Pasifik''' ('''TPP''') yang merupakan perluasan dari TPSEP. TPP adalah rencana perjanjian dagang yang dirundingkan oleh [[Australia]], [[Brunei]], [[Chili]], [[Kanada]], [[Jepang]], [[Malaysia]], [[Meksiko]], [[Selandia Baru]], [[Peru]], [[Singapura]], [[Amerika Serikat]], dan [[Vietnam]] {{as of|2013|8|lc=yes}}.<ref>{{Cite web | last = Michael | first = Gabriel | date = 18 November 2013 | title = The United States is isolated in the Trans-Pacific Partnership negotiations | url = http://www.washingtonpost.com/blogs/monkey-cage/wp/2013/11/18/the-united-states-is-isolated-in-the-trans-pacific-partnership-negotiations/ | accessdate = 19 November 2013 | work = The Monkey Cage | publisher = [[The Washington Post|washingtonpost.com]] }}</ref>
TPP sengaja digambarkan sebagai perjanjian "berstandar tinggi" yang diarahkan untuk menangani masalah perdagangan abad ke-21.<ref>{{cite web|title=The US and the TPP|url=http://www.ustr.gov/about-us/press-office/fact-sheets/2011/november/united-states-trans-pacific-partnership|publisher=USTR|accessdate=5 December 2012}}</ref> Negosiasi yang berlangsung dihujani kritik dan protes dari masyarakat, aktivis, dan pejabat, dikarenakan sifatnya yang rahasia, luasnya cakupan perjanjian, dan klausul kontroversial dalam rancangan perjanjian yang bocor ke publik.
