The man, Arun Kumar, 28, hailed from the south Indian state of Kerala. Three others who were injured in the accident were identified as Ajeesh, Rajeeb and Moosa.
The accident occurred when the driver of the car they were travelling in lost control and crashed into a post near Salalah Sunday, the Times Of Oman reported Monday.
Arun reportedly arrived in Oman last month only just after his marriage.
According to the report, Ajeesh and Rajeeb have been put on ventilators in Sultan Qaboos Hospital in Salalah.
"Moosa has suffered a severe fracture in his leg," a hospital source said.
Arun was working with a company as a salesman in Salalah.
The victims were reportedly going on a shopping trip.