几种典型无效建设工程承包合同无效建设工程承包合同，是指建设工程承包合同虽已成立，但因欠缺合同生效要件，自始不发生法律效力的建设工程承包合同。无效建设工程承包合同相对有效建设工程承包合同而言，无效建设工程承包合同对发承包双方当事人均无法律约束力，不受法律保 Several typical invalid construction contracts invalid Construction contracts for the construction project, refers to the construction contract has been established, but due to the lack of entry into force of the contract, from time to time no legal effect of the construction contract. Invalid construction contract is relatively effective Construction contract, the construction contract invalid contract between the parties to the contract is not legally binding, not legal protection