Tekle Haymanot I (Ge'ez: ተክለ ሃይማኖት, "Plant of religion", throne name Le`al Sagad Ge'ez: ለዓለ ሰገድ, "to whom the exalted bows") was Emperor (27 March 1706 - 30 June 1708) of Ethiopia, and a member of the Solomonic dynasty. He was the son of Iyasu I and Empress Malakotawit. He is often referred to as "Irgum Tekle Haymanot" or "Tekle Haymanot the Cursed"
Tekle Haymanot became Emperor following Iyasus' retirement to an island in Lake Tana. With the support of his mother Empress Malakotawit, some of the officials argued, after the precedent of king Kaleb, that Iyasu had abdicated, and crowned Tekle Haymanot nəgusä nägäst in Gondar. This act was not embraced by the entire state, and the resulting civil strife led to Iyasu's murder at the order of his son Tekle Haymanot.
His unpopularity for having ordered the murder of his widely revered father was profound and he never overcame it. The involvement of his mother Melekotawit, and the acceptance of his position by other members of the dynasty did irreparable harm to the image of the monarchy. His own courtiers plotted against him, and discussions abounded about whether it was worthy to keep such a corrupt dynasty in power.
While travelling in the provinces, Tekle Haymanot was stabbed to death by some of his late father's courtiers.