Quintus Sanquinius Maximus (died AD 47) was a senator of the early Roman Empire, who flourished during the Principate.
The first recorded act of Sanquinius Maximus was in 32, when he defended two consuls who held the fasces in the previous year, Publius Memmius Regulus and Lucius Fulcinius Trio, against the prosecution of the delator Decimus Haterius Agrippa.
Trio, an ally of the powerful praetorian prefect Sejanus, and Regulus had argued constantly during their shared tenure and had threatened to prosecute each other.
Trio responded that it was more proper to efface the memories of rivalries and quarrels between colleagues.
"This secured the safety of Regulus and the postponement of Trio's ruin," Tacitus tells us, and adds, "Haterius was hated all the more.