Literature on organizational learning has mainly focused on intra-organizational learning with little emphasis on inter-organizational learning. Organizations engage in strategic collaborations with other organizations. To realise the full potential of such relationships, it is very important for organizations to realise how learning may take place in such formal inter-organizational set-ups and understand various modes through which learning can be enhanced. This would foster their long term relationships. The paper explores how inter-organizational relationships foster organizational learning process through experiential and vicarious learning. The paper further explores various factors that impact the extent of learning in inter-organizational relationships.