Ejvind Mollerup Blach (31 December 1895 in Copenhagen, Denmark – 1 October 1972 in Frederiksberg, Denmark) was a Danish field hockey player who competed in the 1920 Summer Olympics.

He was a member of the Danish field hockey team, which won the silver medal.

His brother Arne Blach was also a hockey player and competed in the 1928 Olympics.

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