Konrad V Kantner (Polish: Konrad V Kącki) (ca. 1385 – 10 September 1439) was a Duke of Oleśnica, Koźle, half of Bytom and half of Ścinawa during 1412–1427 (with his brothers as co-rulers), since 1427 sole ruler over Oleśnica.
He was the second son of Konrad III the Old, Duke of Oleśnica, by his wife Judith. Like his one older and three younger brothers, at the baptism he received the name of Konrad, which was characteristic in this branch of the House of Piast.
After the death of his father in 1412, Konrad V succeeded him in all his lands together with his older brother Konrad IV as co-rulers, due the minority of their younger brothers.
In 1416, when all Konrad III's sons attained his majority, Konrad IV renounced to the government on behalf of Konrad V and the rest of his brothers. They maintain his co-rule until 1427, when was made the division of the Duchy: Konrad V retained the main city of Oleśnica.
By 9 October 1411, Konrad V married Margareta (d. 15 March 1449), whose origins are unknown. They had five children:
In his will, Konrad V leave the town of Wołów to his wife as her Oprawa wdowia, who was ruled by her until her own death. His sons were excluded from the government by their uncle Konrad VII, who maintained his rule until 1450, when they finally deposed him and assumed the full control over the Duchy.
| Preceded by Konrad III the Old |
Duke of Oleśnica with Konrad IV (until 1416), Konrad VI, Konrad VII and Konrad VIII (until 1427) 1412–1439 |
Succeeded by Konrad VII the White |
| Duke of Koźle with Konrad IV (until 1416), Konrad VI, Konrad VII and Konrad VIII 1412–1427 |
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| Duke of Bytom (1/2) with Konrad IV (until 1416), Konrad VI, Konrad VII and Konrad VIII 1412–1427 |
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| Duke of Ścinawa (1/2) with Konrad IV (until 1416), Konrad VI, Konrad VII and Konrad VIII 1412–1427 |
Succeeded by Konrad VIII the Younger |