While the UK-based IHG already had a standard asking franchisees not to offer pornographic videos, it was not followed at every hotel.
Under its new policy, the standard would be strictly enforced and hotels that continued to offer adult films would face "strict penalities", a spokesman for IHG told Breitbart News.
He added that the company has a commitment to "a range of initiatives designed to safeguard human dignity - from supply chain protocols and human rights to sexual exploitation."
IHG owns 4900 properties in 100 countries around the world, with a total of 727,000 rooms that will no longer offer adult entertainment.
The company's New Zealand hotels include InterContinental Wellington and the Crowne Plazas in Auckland and Queenstown.
In a press statement, Family First NZ described the move as a "significant cultural shift which is well overdue".
- nzherald.co.nz