The Glauber approximation has been applied to the 1s-2s and the 1s-2p excitations of hydrogen atom by proton impact. The total cross sections for the processes have been calculated for incident proton energies ranging from 1 keV to 1 MeV. These have been compared with the corresponding results of other theoretical workers. Comparison has also been made with the available experimental results. At incident energy values of 20 and 30 keV, the results for the total cross sections for the 1s-2p excitation coincide with the experimental values.