It is noted that the visit was not announced in advance.
Blackburn will hold talks with the head of the Taiwanese administration Tsai Ing-wen.
In addition, the US senator has several more meetings scheduled with local leaders.
On August 14, a delegation of US congressmen led by Senator Ed Markey arrived in Taiwan.
On Aug. 8, Chinese Defense Ministry spokesman Wu Qian said the PRC urges the United States to respect Beijing's overriding interests and give up illusions about using Taiwan to control China.