Purchart I (born c. 920/930; died 9 August 975) was the abbot of the Benedictine abbey of Saint Gall from 958 until 971.
He came into the Abbey of Saint Gall at a young age as an oblate and was made deacon under Craloh.
His predecessor Ekkehart I, whom Craloh had selected to be his successor, but an injury following a riding accident prevented him from holding office.
However, economy and discipline suffered under his rule because he could not conduct business himself due to his leg injury.
Abbot Kerbodo of Lorsch was entrusted to carry out reforms which he recorded in the statutes during a longer stay in Saint Gall.