1. Go to Google Chrome Download page at: https://www.google.com/chrome#eula
2. The page says:
Please select your download package:
32 bit .deb (For Debian/Ubuntu)
64 bit .deb (For Debian/Ubuntu)
32 bit .rpm (For Fedora/openSUSE)
64 bit .rpm (For Fedora/openSUSE)
Not Debian/Ubuntu or Fedora/openSUSE? There may be a community-supported version for your distribution here.

Select your OS bit and download .deb file to your local PC. By default it will be downloaded to your /Download folder. Now open terminal and run:

cd Downloads

(then)

sudo dpkg -i google-chrome-stable_current_i386.deb

(google-chrome-stable_current_i386.deb is downloaded file name, if its different than this, then change it.)
It may not install properly sometime because of some supported libraries. However, you can get it resolved by running one more command, that is:

sudo apt-get -f install

Also, if you do not like command line installation, you can use Synaptic Manager tool available.