He was one of two H7N9 avian influenza infections reported in Zhejiang in eastern China, the official Xinhua news agency said, citing local authorities, bringing the country's total number of cases to nine. Chinese authorities are trying to determine how exactly the new variety of bird flu infected people, but say there is no evidence yet of human-to-human transmission.
The latest fatality was a 38-year-old man who worked as a chef, media website Zhejiang Online said. The province's other case was a 67-year-old retiree who was being treated in hospital.
Two other deaths have been reported, both in China's commercial hub of Shanghai. Other cases have occurred in the eastern provinces of Jiangsu and Anhui, the government has said.
The World Health Organization on Tuesday played down fears over the new outbreak of bird flu, but said it was crucial to find out how the virus was spreading.
China is considered one of the countries at greater risk from bird flu because it is one of the world's biggest poultry producers and many chickens in rural areas are kept close to humans.
The more common strain of avian flu, H5N1, has killed more than 360 people globally from 2003 until March 12 this year, according to the World Health Organization.