Convenient synthetic method for 4-arylethylpyrazoles and 4-styrylpyrazoles was developed using ${alpha}$-alkenyl-${alpha},{eta}$-enones readily accessed from the Morita-Baylis-Hillman reaction. For the synthesis of 4-arylethylpyrazole, the reactions with arylhydrazines needed to be carried out in o-dichlorobenzene under $N_2$ balloon atmosphere. On the other hand, 4-styrylpyrazoles required the reactions in ethanol under $O_2$ balloon atmosphere.