?In most countries, it is illegal to own a monkey as a pet. Monkeys are wild animals, and are not domesticated.
If you are interested in having a monkey as a pet, your best bet is to contact a local animal rescue center that specializes in primates, such as a monkey sanctuary. These organizations often accept donations and volunteers to help care for displaced wildlife, including monkeys.
In some areas, you may be able to legally purchase a monkey. Monkeys that are bred and sold as exotic pets are generally more expensive, require special permits, and may require a certain level of care that is beyond the capability of a novice pet owner. It is important to research the laws regarding the sale and possession of exotic pets in your area, including monkeys, prior to making a purchase.