Pacuvius Labeo (died 42 BC) was a Roman jurist and senator, and one of the murderers of Julius Caesar.
He was father of the more eminent jurist Marcus Antistius Labeo, who lived under the emperor Augustus.
Pacuvius was one of the disciples of Servius Sulpicius Rufus, who are stated by Sextus Pomponius to have written books which were digested by Aufidius Namusa.
Having dug in his tent a hole of the length of his body, he settled his worldly affairs, and sent messages to his wife and children.
Then, taking the hand of his most faithful slave, he turned him round (as was usual in the ceremony of manumission), and, giving him his sword, presented his throat to be stabbed, and was buried in his tent in the hole which he had dug.