Space charge behavior such as charge distributions and conduction characteristics has been investigated by treating three low density polyethylenes having equivalent density (0.920 g/㎤) and melt index (2.0 g/10 min) in a xylene solution at 50∼72℃. It is found that the short chains of low molecular weight are removed by a boiling xylene solution increases with the increase of extraction temperature, the amount of which is different sample to sample and that short chains affect charge accumulation in a different manner depending on samples. In the case of conduction characteristics, the removal of short chains reduces current densities in all samples, but a space-charge-limited conduction (SCLC) mechanism found in control LDPE samples remains unchanged regardless of extraction temperature. The charge formation in LDPE is also found to be independent of content of chemical structural irregularities.