Document and Entity Information
6 Months Ended
Dec. 31, 2018
Document And Entity Information [Abstract]  
Document Type 6-K
Amendment Flag false
Document Period End Date Dec. 31, 2018
Document Fiscal Year Focus 2019
Document Fiscal Period Focus Q2
Trading Symbol MESO
Entity Registrant Name MESOBLAST LTD
Entity Central Index Key 0001345099
Current Fiscal Year End Date --06-30