The sequence of the suspected novel coronavirus (KCDC03) was analyzed using the sequences of 54 SARS-CoV-2 including 6 human coronaviruses, Bat-CoVs, and 51 SARS-CoV-2 that have been registered in GISAID by several countries including China, and a phylogenetic tree was produced. Results show that the isolate from Korea was clustered with the new coronavirus, SARS-CoV-2 and classified as betacoronavirus. High homology (99.94%–99.99%) was confirmed with the viral sequences reported from other countries, such as those from Wuhan/IVDC-HB-01/2019(GISAID accession ID: EPI_ISL_402119). Homology with bat CoV (bat-SL-CoVZC45), SARS-CoV (AY278741) and MERS-CoV (JX869059) was 89.1%, 77.5%, and 50%, respectively. However, the lowest homology of 99.5% was observed with BetaCoV/Wuwhan/IVDCHB-04/2020, which could be because of the inaccurate sequence of IVDCHB-04, Hence, it has been excluded from the comparative analysis in other studies.