Cover - shares	6 Months Ended
	Jun. 30, 2024	Aug. 08, 2024
Entity Addresses [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2024
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2024
Current Fiscal Year End Date	--12-31
Entity File Number	001-36199
Entity Registrant Name	PULMATRIX, INC.
Entity Central Index Key	0001574235
Entity Tax Identification Number	46-1821392
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	945 Concord Street
Entity Address, Address Line Two	Suite 1217
Entity Address, City or Town	Framingham
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01701
City Area Code	(888)
Local Phone Number	355-4440
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	PULM
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		3,652,285
Former Address [Member]
Entity Addresses [Line Items]
Entity Address, Address Line One	36 Crosby Drive
Entity Address, Address Line Two	Suite 100
Entity Address, City or Town	Bedford
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01730