In South East Nigeria, between 1998 and 2015, about 774 businesses out of about 1,290 have gone into extinction, leaving only about 516 in existence. Thus, this study seeks to find out the relationship between leadership and SME sustainability in Nigeria. Descriptive Research design was used. The findings revealed that there was leadership innovativeness in the sector. Also, that the SME leaders show dynamism in changing business times which has boosted their risk management skill. The study recommended the implementation of the planned behavior model among SME leaders to enhance business growth and sustainability.