Document and Entity Information	3 Months Ended
	Dec. 31, 2012	Feb. 14, 2013
Document and Entity Information
Entity Registrant Name	Southern Missouri Bancorp Inc
Document Type	10-Q
Document Period End Date	Dec. 31, 2012
Amendment Flag	false
Entity Central Index Key	0000916907
Current Fiscal Year End Date	--06-30
Entity Common Stock, Shares Outstanding		3,257,076
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2