The photometric and spectroscopic observations of nearby type IIP supernova 2004dj are presented .
The ^ { 56 } Ni mass estimated from the light curve is \approx 0.02 ~ { } M _ { \odot } .
This estimate is found to be consistent with the H \alpha luminosity .
SN2004dj reveals a strong asymmetry of the H \alpha emission line at the nebular epoch with the shift of the maximum of -1600 km s ^ { -1 } .
A similar asymmetric component is detected in H \beta , [ O I ] and [ Ca II ] lines .
The line asymmetry is interpreted as a result of the asymmetry of ^ { 56 } Ni ejecta .
The H \alpha profile and its evolution are reproduced in the model of the asymmetric bipolar ^ { 56 } Ni and spherical hydrogen distributions .
The mass of the front ^ { 56 } Ni jet is comparable to the central component and twice as larger compared to the rear ^ { 56 } Ni jet .
We note that the asymmetric bipolar structure of of ^ { 56 } Ni ejecta is revealed also by SN1999em , another type IIP supernova .