But any hint of recognition of this by world leaders enrages China. It announced on Friday that sanctions have been placed on Ms Pelosi and her family over the visit.Beijing also announced it was halting co-operation with the US in several key areas including climate change, military talks and efforts to combat international crime.
US Secretary of State Antony Blinken accused China of taking "irresponsible steps" by blocking key communication channels with Washington.
Ms Pelosi - a long-time China critic and the highest-ranking US politician to travel to the island in 25 years - arrived in Taiwan on Tuesday, despite Beijing's warnings.
During her visit, Ms Pelosi said that "the world faces a choice between autocracy and democracy".
China and Taiwan: The basics
- Why do China and Taiwan have poor relations? China sees the self-ruled island as a part of its territory and insists it should be unified with the mainland, by force if necessary
- How is Taiwan governed? The island has its own constitution, democratically elected leaders, and about 300,000 active troops in its armed forces
- Who recognises Taiwan? Only a few countries recognise Taiwan. Most recognise the Chinese government in Beijing instead. The US has no official ties with Taiwan but does have a law which requires it to provide the island with the means to defend itself