Henri Grob (4 June 1904 – c. 5 July 1974[a]) was a Swiss chess player, artist, and painter.

Grob pioneered eccentric chess openings, in particular 1.g4, about which he wrote a book (Angriff g2–g4, Zürich, 1942).

All of the games were played against readers of the Neue Zürcher Zeitung, a leading Swiss newspaper.

Grob analysed the opening extensively and used it often in his correspondence games in the Neue Zürcher Zeitung.

The opening is generally shunned by skilled players, as results tend to be poor for White.