Dear Sir, This financial year 2010-11, I have booked a Loss in Equity market, I want to Know , Can I less these capital loss in my salary.

 @devender25681: Short-term capital loss canbe set-off against short-term and/or long-term capital gain only. Long-term capital loss can be set-off against long-term capital gain only.

capital losses can only be set off against capital gains —--- other incomes like salary or business income cannot be used for set-off. Now, LTCL can only be set off against taxable LTCG. However, STCL can be set off against both STCG as well as taxable LTCG. after set off with current year profits if you still left with loss . such amount of loss can be carry forward and setoff is permissible for 4 assessment years immediately succeeding the assessment year for which the loss was computed. note: this loss can be carryforward only if the return is filed with in due dates u/s 139(1)