Document and Entity Information	9 Months Ended
	Apr. 30, 2015	May 31, 2015
Document and Entity Information
Entity Registrant Name	CANTEL MEDICAL CORP
Entity Central Index Key	0000019446
Document Type	10-Q
Document Period End Date	Apr. 30, 2015
Amendment Flag	false
Current Fiscal Year End Date	--07-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		41,546,915
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3