v3.25.2
Cover Page - shares
6 Months Ended
Jun. 30, 2025
Jul. 31, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 001-40212  
Entity Registrant Name Connect Biopharma Holdings Limited  
Entity Incorporation, State or Country Code E9  
Entity Address, Address Line One 3580 Carmel Mountain Road  
Entity Address, Address Line Two Suite 200  
Entity Address, City or Town San Diego  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 92130  
City Area Code 877  
Local Phone Number 245-2787  
Title of 12(b) Security American Depositary Shares, each representing one Ordinary Share, par value $0.000174 per Share  
Trading Symbol CNTB  
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 true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding (in shares)   55,721,657
Entity Central Index Key 0001835268  
Amendment Flag false  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2025  
Current Fiscal Year End Date --12-31