The Thinker (French: Le Penseur) is a bronze sculpture by Auguste Rodin, situated atop a stone pedestal. The work depicts a nude male figure of heroic size sitting on a rock. He is seen leaning over, his right elbow placed on his left thigh, holding the weight of his chin on the back of his right hand. The pose is one of deep thought and contemplation, and the statue is often used as an image to represent philosophy.

Rodin conceived the figure as part of his work The Gates of Hell commissioned in 1880, but the first of the familiar monumental bronze castings was made in 1904, and is now exhibited at the Musée Rodin, in Paris.

There are 27 other known full-sized castings, in which the figure is approximately 185 cm (73 inches) high, though not all were made during Rodin's lifetime and under his supervision. There are various other versions, several in plaster, and studies and posthumous castings exist in a range of sizes.