Step 1: Login to Your Blogger Account. After which Go to your Blogger Dashboard,Click on Layout tab from left plane and click on Add a Gadget link.
Step 2:After clicking on Add a Gadget link A pop-up box will open now with many gadget list, Choose HTML/JavaScript from the gadget options by clicking the blue plus sign for that gadget.
Step 3: Select 'HTML/Javascript' and add the one of code given below. Step 4: Now Click On Save 'JavaScript' . Or Method 2
1. Find out your Facebook fan page URL by visiting your Facebook fan page and copy the URL in the address bar - you can see how your URL should look like in this screenshot:
2. Then visit this page: http://developers.facebook.com/docs/reference/plugins/like-box
3. Paste your URL into the Facebook Page URL field
4. Once you are satisfied with the looks of the Like Box, click on the "Get Code" button
5. You'll be given two codes, titled HTML 5, XFBML and IFRAME. The one we need is the 'iframe' code. Select it and copy the code generated in this box
6. Log in to your Blogger account , go to 'Layout' > click on the 'Add a Gadget' link
7. From the pop-up window, scroll down and select the 'HTML/JavaScript' gadget:
8. Paste the code in the empty HTML box:
9. Click Save and you're done.
I got this video from youtube, hope its helps.
