A process for preparing a briquette is disclosed. The process comprises a coal with a caking substance having a softening point of 20.degree.-40.degree. C. or with a caking substance having a softening point of above 40.degree. C. and a solvent which has fluidity at normal temperature and is compatible with the caking substance to a coal for making briquettes, powerfully mixing at a temperature of above 10.degree. C., preferably of 20.degree.-50.degree. C., for 1-10 minutes, by using a mixer provided with a mixing tool which is rotated at a speed of more than 5m/sec. peripheral velocity and/or a mixer provided with a mixing tool which applies a pressure of more than 45kg/cm.sup.2 ; and briquetting by using a roll press, whereby a briquette is obtained having a shutter strength of more than 80 and a trommel strength of more than 90.