M. Karagatsis (Greek: Μ. Καραγάτσης) was the pen name of Dimitrios Rodopoulos (Δημήτριος Ροδόπουλος), an important modern Greek novelist, journalist, critic, and playwright. The pen name "M. Karagatsis" is the name by which the novelist is known. The letter "M." comes from Mitya, which is the Russian diminutive of Dimitris (his real name). The word "Karagatsis" is derived from the "karagatsi" tree under the shadow of which he used to write as a young writer.

Karagatsis was born in Athens on June 23, 1908, and died in Athens on September 14, 1960. He grew up in Larissa and Thessaloniki and studied law in France. He is associated with the "Generation of the '30s".

His writing is characterized as bold, sensual, with great imagination and a unique narrative style. Karagatsis's work often explores the illusory reality of persons and situations, making his work a subject of study for Greek students.