Biff Loman是Willy Loman的老儿子，似乎是整个戏剧中任何实际自我发展的唯一角色。BIFF三十四岁，并与他的生活不满意。
作为一个少年，突然似乎是威利的苹果。威利崇拜他，对他有很大的希望和愿望，并对他崇拜他的父亲并认为他是一个完美的榜样。他总是被父亲称赞和祝贺，因为他发展着崇高的自我意识。
他有吸引力，男性化的特征让他在学校流行，增加了他的自信和自豪感。看来威利鼓励他的身份，即使他错了，也要占据他的一面。当威利学会了生物从学校更衣室里偷了一个篮球时，他嘲笑他的盗窃并进一步鼓励它说，“教练可能会祝贺你的主动性。”
This justification of Biff’s actions later develops in Biff a compulsive tendency to steal, due to which he also later ends up spending three months in jail. Biff initially believes in his father’s lies and thus takes part in his delusionary world, simultaneously developing the same habit of over glorifying his reality and counting his chickens before they hatch.
However, when Biff, in an unfortunate series of events, discovers that Willy has been having an affair with a strange woman, his world comes crashing down. He realizes that his father is nothing but a “phony little fake”.
他对父亲的信任遭受了很大的打击，而且，他对自己的信心也被摧毁。然而，这一事件让他摆脱了整个洛族家庭生活的错觉世界，因此BIFF最终成为唯一一个理解的人，并努力将他的父亲和其他人带出他们的外观。
一个三十四岁的男人，现在的BIFF“忍受了一个磨损的空气，似乎不那么自信”。他的生命中没有成功，因此对此不满意。他失业了，嘲笑他的父亲。“在三十四岁时找不到自己是一个耻辱。”
他与父亲的关系是紧张的，部分原因是他对威利的婚外事件的了解，部分原因是威利的不满和不赞成他儿子的生活选择。BIFF对需要手工劳动并表现出对桌面工作的职位的职位强烈倾向。因此，他在选择占领他的兴趣和选择一个接受他父亲的批准并赢得了收入的人之间冲突。
虽然BIFF似乎比其他人更好地了解自己和他的家庭，但他往往是威利的威胁改变现实的习惯，并且带走了快乐的华丽，不切实际的想法，也有助于他们。“当然，我们遍布县城！”当他讨论他与他的兄弟建造牧场的计划时，呼喊了。
BIFF很快决定访问他的前雇主的比尔奥利斯，试图为自己提供一份工作来支持他的父母。他被父亲所赐给他的父亲，奥利弗“思想世界”，他是他作为一个推销员的推销员。然而，当他遇到Oliver时，BIFF意识到他只是一个送给他的职员，而不是一个推销员。然后他给了我一个看，我意识到我一生都荒谬的谎言。“
He decides to tell the truth to his father, instead of sugarcoating it with lies and self-deceit, but his father refuses to accept his reality. Biff confronts his father about the rubber pipe and his suicide attempts and tries to open his eyes to reality. “The man ain’t know who we are! The man is gonna know.” Biff tells the family that they “never told the truth for ten minutes in this house”.
He soon bursts into tears of frustration and desperation, and pleads to his father, “Will you please let me go, for Christ’s sake? Will you take that phony dream and burn it before something happens?”
However, Biff’s attempt to bring Willy down to earth proves to be futile, as Willy is far too delusional to accept the reality. Instead, Willy overwhelmed and unable to bear the truth is driven to commit suicide.
Thus, Biff is a character who is far from perfect and has a lot of flaws. However, he displays courage and a determination to stay true to himself and his reality despite his family’s tendency towards falsehood and self-deception.
他最初混淆，不满意并将自己视为失败。然而，他表现出大量的个性发展，最终理解自己和他的能力，从他的混乱中出现。“我知道我是谁，孩子。”
