The four-day conference will focus on the opportunities the SNP believe independence will bring Scotland, with Nationalists seeking to contrast these with the consequences of remaining part of the UK.
Scotland's First Minister Alex Salmond is set to give a welcome address when the conference kicks off later.
More top news
A band of heavy rain is heading for the UK, threatening to make the May Bank Holiday a washout, the Met Office has warned.
Headteachers could strike in protest at government plans to force schools to become academies
Tonight it'll become dry and clear for most parts of Britain.