The usage area of sub-product rent contracts is being more common every passing day. Especially, being able to include rights, companies, enterprises to product rent contract differently from ordinary rent and roofed workplace rent contract has increased these contracts field and importance. By considering that the number of studies have been made regarding on sub-product rent contracts is less, it’s seen necessary to make an examination of the liability arising from defect and suppression in sub-product rental contract accordingly. Our study’s aim is to determine the liability arising from defect and suppression in sub-product rent cont- racts that are being more common every passing day. In this scope, firstly a general information about sub-rental contracts and sub-product rent contracts has been provided with the reason of sub-product rent contracts being a type of both product rental contracts and sub-product rental contracts. Afterwards in terms of sub-product rental contract, the liability arising from defect and suppression has been discussed in terms of proprietor, tenant and sub- product tenant separately. The events of defect and suppression that arise indigenous to sub-product rent have been discussed under the light of doctrine and Supreme Court decisions. It because our study’s subject aims determining the liability arising from defect and suppression in sub-product rental contracts, the verdict and consequences of defect and suppression have been left out of the scope. In conclusion, the opinions obtained because of our study have been gathered in the conclusion part.