Louis Plaidy (28 November 1810 – 3 March 1874) was a celebrated German piano pedagogue and compiler of books of technical music studies.

[1][2] Born in Hubertusburg, Saxony, Plaidy initially focused on the violin, and toured as a concert violinist, but he later studied the piano, particularly the technical aspects of playing.

[1] Plaidy was renowned for his ability to impart technical skills to his students.

[3] In 1843, Felix Mendelssohn invited Plaidy to join the faculty of the Leipzig Conservatory to teach the piano.

[1] Plaidy published a book on piano pedagogy, Technische Studien für das Pianofortespiel, which was highly thought of and is still used today,[1][3] and a pamphlet, Der Klavierlehrer, said to be of little worth.