The treatment accorded by grammarians to the passive reflexive construction as applied to personal subjects in Old Spanish is either incomplete or inexplicit. Diez, for example, gives no indication as to the extent of its use in either early or modern Spanish. Cuervo asserts that the passive reflexive is “arraigado” in the language of the early period, but cites examples with only inanimate subjects. We infer from his remarks that with a personal subject this construction came into general use in the sixteenth and seventeenth centuries. According to Meyer-Lübke, its use with personal subjects was extensive only during these centuries. Hanssen is of the opinion that the passive reflexive was of little use in the early period and that with a personal subject its use was limited to the single verb uencerse. The present study will indicate the status of this construction in Old Spanish: the extent of its use as applied to persons insofar as may be demonstrated by an examination of a representative text of that period. As such a text the Primera crónica general has been chosen, because, with its plurality of authorship and great length, it represents an admirable cross-section of Old Spanish prose.