Mai Shein (born May 10, 1946 in Räägi village) is a notable Estonian architect.
Mai Shein studied in the National Art Institute of the Estonian SSR (today’s Estonian Academy of Arts) in the department of architecture. She graduated from the institute in 1970.
From 1970 to 1990 Mai Shein worked in the Tallinn office of the soviet design bureau Tsentrosojuz Projekt. Currently Mai Šein works in the architectural bureau Mai Shein OÜ.
Notable works by Mai Shein are the Golf Club of Tallinn in Niitvälja, the building of the Energetics department of the Tallinn Technical University, apartment building on Koidula Street and the terrace housing on the Sõpruse road. Mai Shein is a member of the Union of Estonian Architects.