Praise be to Allah.
Blowing oneself up is suicide, which is haraam (forbidden) because Allah, may He be exalted, says (interpretation of the meaning): “And do not kill yourselves” [an-Nisa’ 4:29]. And the Prophet (blessings and peace of Allah be upon him) said: “ … “Whoever kills himself with a piece of iron will have that iron in his hand, thrusting it into his belly in the Fire of Hell for ever and ever.” Narrated by al-Bukhaari, 5442; Muslim, 109.
We think that the suicide missions in which a person is certain that he is going to die are haraam; in fact they come under the heading of major sins, because the Prophet (blessings and peace of Allah be upon him) said: “Whoever kills himself with something in this world will be punished with it on the Day of Resurrection.” Narrated by al-Bukhaari, 5700; Muslim, 110..
In fact he (may Allah have mercy on him) said in his fatwa for Majallat ad-Da‘wah (1418 AH), when he was asked about this issue: My opinion concerning that is that he is killing himself and that he will be punished in Hell for having killed himself, as is mentioned in a saheeh report from the Prophet (blessings and peace of Allah be upon him)…