A child car safety seat includes: a base 3 having a shell body 30 that defines an inner space 301 therein and that is formed with a viewing window 31 fox permitting a user to view therethrough into the inner space 301; a seat body 2 detachably mountable on and engageable with the base 3; and an indicator 12 disposed in the inner space 301 in the shell body 30 and having an indication 12a. The indicator 12 is operatively associated with the base 3 and the seat body 2 such that the indication 12a is disposed at the viewing window 31 upon engagement between the seat body 2 and the base 3 so as to permit the user to see the indication 12a through the viewing window 31 and is not disposed at the viewing window 31 upon disengagement between the seat body 2 and the base 3.
Child car safety seat