Eighteen cases, who had visited the department of pediatrics of Doai Memorial Hospital and died from asthma, were analyzed from the asthmatic conditions during 12 months before death.The daily record of their asthma attacks was expressed as monthly asthma attack score. The change of this score during 12 months before their death could be divided into five patterns. They were; acute exacerbation type in a short period, recurrent type with frequent moderate to severe attacks, relapsing type, sudden death type after the short convalscent stage following frequent severe attacks and sudden unexpected type. In sudden unexpected type, most of them were adlescent, without the history of medication by steroid and of admission with asthma attacks and died recently after 1980. In other types, most of them had the history of medication by oral steroid and that of admission with asthma attacks except sudden death type after the short convalscent stage. Their history of life-threatening attack was found only in two cases and only about a half of them had the history of admission with asthma attacks during 12 months before dath.