Eero Aarnio (born 1932) is a Finnish interior designer, well known for his innovative furniture designs in the 1960s, notably his plastic and fiberglass chairs.
Aarnio studied at the Institute of Industrial Arts in Helsinki, and started his own office in 1962. The following year he introduced his Ball Chair, a hollow sphere on a stand, open on one side to allow a person to sit within. The similar Bubble Chair was clear and suspended from above. Other innovative designs included his floating Pastil Chair and Tomato Chair. His Screw Table, as the name suggests, had the appearance of a flat head screw driven into the ground.
Aarnio's designs were an important aspect of 1960s popular culture, and could often be seen as part of sets in period science-fiction films. Because his designs used very simple geometric forms, they were ideal for such productions.
Aarnio is still active in creating new designs and, while he has also worked with more traditional materials like wood and steel during his long career, still mainly draws products that follow his distinct style of playful shapes and colors only manufacturable in plastic.