Mali makes left of the 26 important countries in the world of which 18 in Africa for the elimination of tetanus neonatal. The plan of action conceived to this effect doesn't keep the District of Bamako like zone of intervention, had consideration to the sanitary conditions judged among best in the country. However, the district of Bamako arranges today of a number important of peripheral districts whose isolated sanitary realities can generate some indicators different of the middle indicators of the District. It is for this reason that we undertook this work, while using the LQAS method separately in each of the six communes of the district of Bamako, for i) to determine the percentage of mothers of children of 15 at 49 years having received at least two doses of antitetanus vaccine at the time of their last pregnancy in each of the six communes of the district, ii) to identify the non effective zones of the district concerning vaccination of mothers of children of less than 23 months. It was about an investigation of antitetanus vaccinal coverage of mothers of children of less than 23 months by gone residents since at least 3 months in the six communes of the district of Bamako in April 2004. The vaccinal status of targets of the survey was established from the card of vaccination or the notebook of health delivered at the time of the prenatal consultations. In the first five communes, for topics not having card or notebook of health us established the vaccinal status also by cross-examination, what has been qualified of determination of the statute by " history ", Of the survey it comes out again that the rates of cover in at least two doses of antitetanus antigen of mothers of children of less than 23 months vary from 17.6 ± 7.2% (Commune V ) to 78.4 ± 7.0% (Commune II) according to the card. In the first five townships these rates go from 46.3 ± 9.5 % (commune V) to 94.01 ± 3.4% (commune IV) according to the card and history. According to the card, the communes I, IV and V, didn't record any zone of cover of the CSCOMS concerning vaccinations where the rate of mothers having received the VAT2 reaches 80%, in reference to the value of decision (6) either vaccinated at least 13 topics (68,4%) by lot. The assessment of the coverage according to the card and history improves this weak performance noted in certain zones of cover (communes I, III, IV). Results of this survey put as it was always the case the problem of data compilation concerning assessment of the vaccinal coverage. And for reasons of efficiency, an approach associating the backing of the routine’s vaccination, of countries of mass magazines and a highly efficient surveillance of tetanus neonatal is to consider.