This paper examines the development of Greek comic love plots in the period of Middle Comedy (ca. 380-320 BC). The basic pattern of the comic love plot (a young man in love, prevented by various obstacles from being united with his beloved, and devising a scheme to overcome them) appears firmly established in New Comedy, but has a considerable prehistory on the Greek stage. The remains of Middle Comedy suggest that such love plots were well developed and established in the comic repertoire by ca. 340-330, while comedies on love themes were being produced already in the 350s or 360s. Remote antecedents can be found in Old Comedy: few and isolated in the ?th century, they become commoner in the beginning of the 4th, pointing to a rising preoccupation of the comic theatre with love themes. Finally, mythological comedies about Zeus' love affairs are examined. Most of them date from the period 410-340 BC. Their remains suggest that they contributed significantly to the formation and development of comic love plots in the ?th century.