Robert Změlík (Czech pronunciation: [ˈrobɛrt ˈzmɲɛliːk], born 18 April 1969 in Prostějov) is a Czech track and field athlete who won a gold medal in Olympic decathlon in 1992.

Změlík's Olympic success was influential for two other Czech decathletes and world record holders, Tomáš Dvořák and Roman Šebrle.

He was a frequent competitor at the Hypo-Meeting in Götzis, Austria, participating in 1989, 1991, 1992, 1993 and 1995.

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