The kinetics of coil-globule transition was studied by static light scattering measurements on poly(methyl methacrylate) with the molecular weight M-w X 10(-6) = 8.4 and 12.2 in isoamyl acetate. Since the phase separation of the solution occurred very slowly, the mean-square radius of gyration of the polymer could be determined for a long time after quench to far below the theta-temperature 61 degrees C. The expansion factor alpha(2) observed 30 min after quench to below the coil-globule crossover point, deviated largely from theoretical predictions, and was found to be a transient one. Chain collapse processes were measured in the time range from 30 min to a few thousand min after the quenches to 30 degrees C and 45 degrees C for M-w X 12.2 X 10(6) and to 30 degrees C for M-w = 8.4 X 10(6). The expansion factor in each process approached a constant value a alpha(eq)(2) in the time range. The collapse process was expressed as a function of time t(min) by alpha(2) = alpha(infinity)(2) + {b/(t + c)}(p), where b, c, p, and alpha(infinity)(2) were constant, independent of time. In all the three processes the constants had values near p similar to 0.5, b similar to 0.4, c similar to 0.6, and alpha(infinity)(2) was slightly smaller than alpha(eq)(2). The constant c was introduced to satisfy the initial condition of alpha(2) = 1 at t = 0.This behavior of alpha(2)(t) and a comparison with kinetic theories of chain collapse concluded that the chain collapse occurred in a single stage process without formation of chain knots.