Document and Entity Information - shares	6 Months Ended
	Nov. 30, 2017	Jan. 09, 2018
Document And Entity Information
Entity Registrant Name	TAYLOR DEVICES INC
Entity Central Index Key	0000096536
Document Type	10-Q
Document Period End Date	Nov. 30, 2017
Amendment Flag	false
Current Fiscal Year End Date	--05-31
Is Entity a Well-known Seasoned Issuer?	No
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		3,455,762
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2