Abstract: The present invention relates to a process for producing gelatinized grain for food or food processing material without steaming or boiling. The present invention comprises adjusting the water content of the grain before puffing to 40% or less, puffing the grain at 100.degree. C., further adding water to the puffed grain, and then coarsely pulverizing the grain, thereby producing coarsely pulverized porous grain. According to the present invention, the coarsely pulverized porous grain having a good crispness as well as a homogeneous water absorption and easy handling, can be obtained.