Eero Aarnio (Helsinki, Finland, July 21, 1932) is a Finnish designer, known for his innovative furniture during the 1960s, in particular for his plastic and fiberglass armchairs.[1]​.

Aarnio studied at the Helsinki University of Industrial Arts (now Aalto University), between 1954 and 1957. He founded his studio in 1962 and since then has worked mainly as an interior and furniture designer, and to a lesser extent as a photographer and graphic designer.[2]​.

In the 1960s he began to experiment with fiberglass, exploring the formal possibilities of this material, combining it with organic shapes and bright colors, characteristics that gave him his success.[3]​.

During this time he made his most successful designs, among which were the Mushroom benches, created in 1962; the ball chair (1962), a sphere padded inside and resting on the floor; and the bubble chair (1968), a transparent sphere with a seat inside, designed to be hung from the ceiling.

In 1967 he received the American Industrial Design Award for his design of the Pastille chair, in fiberglass, which can be used in water. For this chair he also received the ADI (Associazione per il Disegno Industriale) award in 1968.

He won the Red Dot award in 2012 for his Ghost lamp.[3]​.