Lightning is an event of release charge the inside or outside clouds. Lightning occurs because of existence a convective cloud i.e. Cumulus Nimbus (Cb). These clouds have a positive and negative charge. The positive charge in upper of clouds and the negative charge in bottom the clouds. These clouds can also make the rain. Usually lightning occurs when the rain happens. However, sometimes lightning occurs but the rain not happens. This studies aims to know relation of the pattern of the lightning related the rainfall in Aceh besar regency. Data were obtained from station of geophysics and meteorology in Aceh Besar area. The data are number of lightning strikes and rainfall (>50 mm) as long as 3rd years (2009 to 2011). It processed with Microsoft excel code. Data analysis is an according to the rain pattern in Aceh Besar area i.e. December-January-February (DJF), March-April-May (MAM), June-July-August (JJA) and September-October-November (SON). The results show the linear relation between lightning and rain with RMS 0,9 for each pattern data. So that, we can conclude that the pattern of lightning in Aceh Besar follow the pattern of rain in that area. Keywords : Lightning, Convective Clouds, Rainfall